Child & Teen BMI Calculator | CDC Guidelines<\/title>\r\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\r\n <meta name=\"description\" content=\"Calculate BMI for children and teens (ages 2-19). Get basic BMI results and learn about CDC growth chart percentiles.\">\r\n <style>\r\n * {\r\n box-sizing: border-box;\r\n }\r\n body {\r\n font-family: 'Arial', sans-serif;\r\n max-width: 800px;\r\n margin: 0 auto;\r\n padding: 20px;\r\n background-color: #f0f8ff;\r\n color: #333;\r\n line-height: 1.6;\r\n }\r\n .calculator-container {\r\n background: linear-gradient(135deg, #36d1dc 0%, #5b86e5 100%);\r\n border-radius: 15px;\r\n padding: 30px;\r\n color: white;\r\n box-shadow: 0 10px 30px rgba(0,0,0,0.2);\r\n margin-bottom: 30px;\r\n }\r\n h1 {\r\n text-align: center;\r\n margin-bottom: 10px;\r\n font-size: 2.5rem;\r\n text-shadow: 2px 2px 4px rgba(0,0,0,0.3);\r\n }\r\n .subtitle {\r\n text-align: center;\r\n font-size: 1.1rem;\r\n opacity: 0.9;\r\n margin-bottom: 30px;\r\n }\r\n .form-group {\r\n margin-bottom: 20px;\r\n }\r\n label {\r\n display: block;\r\n margin-bottom: 8px;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n }\r\n select, input[type=\"date\"] {\r\n width: 100%;\r\n padding: 12px;\r\n border: none;\r\n border-radius: 8px;\r\n font-size: 1rem;\r\n background: rgba(255,255,255,0.9);\r\n }\r\n .form-row {\r\n display: grid;\r\n grid-template-columns: 1fr 1fr;\r\n gap: 20px;\r\n }\r\n @media (max-width: 600px) {\r\n .form-row {\r\n grid-template-columns: 1fr;\r\n }\r\n }\r\n .measurement-group {\r\n background: rgba(255,255,255,0.1);\r\n padding: 20px;\r\n border-radius: 8px;\r\n margin-bottom: 15px;\r\n }\r\n .height-inputs {\r\n display: grid;\r\n grid-template-columns: 1fr 1fr;\r\n gap: 10px;\r\n margin-bottom: 10px;\r\n }\r\n .unit-label {\r\n font-size: 0.9rem;\r\n opacity: 0.8;\r\n margin-top: 5px;\r\n text-align: center;\r\n }\r\n .calculate-btn {\r\n background: #ff9a3c;\r\n color: white;\r\n border: none;\r\n padding: 15px 30px;\r\n font-size: 1.2rem;\r\n border-radius: 50px;\r\n cursor: pointer;\r\n width: 100%;\r\n margin-top: 20px;\r\n font-weight: bold;\r\n transition: all 0.3s ease;\r\n box-shadow: 0 5px 15px rgba(255,154,60,0.4);\r\n }\r\n .calculate-btn:hover {\r\n background: #ff7b00;\r\n transform: translateY(-3px);\r\n box-shadow: 0 8px 20px rgba(255,154,60,0.6);\r\n }\r\n .results {\r\n display: none;\r\n background: white;\r\n color: #333;\r\n padding: 25px;\r\n border-radius: 10px;\r\n margin-top: 30px;\r\n box-shadow: 0 5px 15px rgba(0,0,0,0.1);\r\n }\r\n .bmi-result {\r\n font-size: 3.5rem;\r\n font-weight: bold;\r\n text-align: center;\r\n margin: 20px 0;\r\n color: #36d1dc;\r\n }\r\n .info-box {\r\n background: rgba(54, 209, 220, 0.1);\r\n padding: 20px;\r\n border-radius: 10px;\r\n margin: 20px 0;\r\n border-left: 4px solid #36d1dc;\r\n }\r\n .cdc-recommendation {\r\n background: rgba(76, 175, 80, 0.1);\r\n padding: 20px;\r\n border-radius: 10px;\r\n margin: 20px 0;\r\n border-left: 4px solid #4CAF50;\r\n }\r\n .cdc-link-box {\r\n text-align: center;\r\n padding: 25px;\r\n background: linear-gradient(135deg, #36d1dc 0%, #5b86e5 100%);\r\n border-radius: 10px;\r\n margin: 25px 0;\r\n color: white;\r\n }\r\n .cdc-link-box a {\r\n color: white;\r\n background: #ff9a3c;\r\n padding: 12px 30px;\r\n border-radius: 50px;\r\n text-decoration: none;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n display: inline-block;\r\n margin-top: 15px;\r\n transition: all 0.3s ease;\r\n }\r\n .cdc-link-box a:hover {\r\n background: #ff7b00;\r\n transform: translateY(-2px);\r\n box-shadow: 0 5px 15px rgba(255,154,60,0.4);\r\n }\r\n .info-section {\r\n background: white;\r\n padding: 25px;\r\n border-radius: 10px;\r\n margin-top: 30px;\r\n box-shadow: 0 5px 15px rgba(0,0,0,0.1);\r\n }\r\n .info-section h3 {\r\n color: #36d1dc;\r\n margin-top: 0;\r\n }\r\n .reset-btn {\r\n background: #4CAF50;\r\n color: white;\r\n border: none;\r\n padding: 12px 25px;\r\n border-radius: 50px;\r\n cursor: pointer;\r\n margin-top: 20px;\r\n font-weight: bold;\r\n display: inline-block;\r\n transition: all 0.3s ease;\r\n }\r\n .reset-btn:hover {\r\n background: #45a049;\r\n transform: translateY(-2px);\r\n }\r\n .or-divider {\r\n text-align: center;\r\n margin: 10px 0;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n }\r\n .measurement-system {\r\n margin-bottom: 15px;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n }\r\n .age-group {\r\n background: rgba(255,255,255,0.1);\r\n padding: 15px;\r\n border-radius: 8px;\r\n margin-bottom: 20px;\r\n }\r\n .warning-note {\r\n background: rgba(255, 152, 0, 0.2);\r\n border-left: 4px solid #ff9800;\r\n padding: 15px;\r\n margin: 20px 0;\r\n border-radius: 4px;\r\n }\r\n .bmi-scale {\r\n height: 25px;\r\n background: linear-gradient(to right, #36d1dc, #4caf50, #ff9800, #f44336);\r\n border-radius: 12px;\r\n margin: 25px 0;\r\n position: relative;\r\n }\r\n .scale-labels {\r\n display: flex;\r\n justify-content: space-between;\r\n font-size: 0.9rem;\r\n color: #666;\r\n margin-top: 8px;\r\n font-weight: bold;\r\n }\r\n .scale-note {\r\n text-align: center;\r\n font-size: 0.85rem;\r\n color: #666;\r\n margin-top: 5px;\r\n font-style: italic;\r\n }\r\n .age-input-note {\r\n font-size: 0.85rem;\r\n opacity: 0.8;\r\n margin-top: 5px;\r\n text-align: center;\r\n }\r\n .result-details {\r\n margin: 20px 0;\r\n }\r\n .detail-item {\r\n display: flex;\r\n justify-content: space-between;\r\n padding: 12px 0;\r\n border-bottom: 1px solid #eee;\r\n }\r\n .detail-item:last-child {\r\n border-bottom: none;\r\n }\r\n .detail-label {\r\n font-weight: bold;\r\n color: #555;\r\n }\r\n .detail-value {\r\n font-weight: bold;\r\n color: #36d1dc;\r\n }\r\n <\/style>\r\n<\/head>\r\n<body>\r\n <div class=\"calculator-container\">\r\n <h1>\ud83d\udc76 Child & Teen BMI Calculator<\/h1>\r\n <p class=\"subtitle\">For ages 2-19 years | Calculate Basic BMI (For percentile results, use CDC calculator)<\/p>\r\n \r\n <div class=\"age-group\">\r\n <div class=\"form-row\">\r\n <div class=\"form-group\">\r\n <label for=\"birth-date\">Child's Birth Date<\/label>\r\n <input type=\"date\" id=\"birth-date\" max=\"\">\r\n <\/div>\r\n <div class=\"form-group\">\r\n <label for=\"measurement-date\">Measurement Date<\/label>\r\n <input type=\"date\" id=\"measurement-date\" max=\"\">\r\n <\/div>\r\n <\/div>\r\n <div class=\"form-group\">\r\n <label for=\"gender\">Gender<\/label>\r\n <select id=\"gender\">\r\n <option value=\"male\">Male (Boy)<\/option>\r\n <option value=\"female\">Female (Girl)<\/option>\r\n <\/select>\r\n <\/div>\r\n <\/div>\r\n \r\n <div class=\"measurement-group\">\r\n <div class=\"measurement-system\">Height<\/div>\r\n <div class=\"height-inputs\">\r\n <div class=\"form-group\">\r\n <label for=\"height-feet\">Feet<\/label>\r\n <select id=\"height-feet\">\r\n <option value=\"\">Select feet<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <div class=\"form-group\">\r\n <label for=\"height-inches\">Inches<\/label>\r\n <select id=\"height-inches\">\r\n <option value=\"\">Select inches<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <\/div>\r\n <div class=\"or-divider\">OR<\/div>\r\n <div class=\"form-group\">\r\n <label for=\"height-cm\">Centimeters<\/label>\r\n <select id=\"height-cm\">\r\n <option value=\"\">Select centimeters<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <div class=\"unit-label\">Select height in feet\/inches OR centimeters<\/div>\r\n <\/div>\r\n \r\n <div class=\"measurement-group\">\r\n <div class=\"measurement-system\">Weight<\/div>\r\n <div class=\"form-row\">\r\n <div class=\"form-group\">\r\n <label for=\"weight-pounds\">Pounds<\/label>\r\n <select id=\"weight-pounds\">\r\n <option value=\"\">Select pounds<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <div class=\"or-divider\" style=\"margin: auto 0;\">OR<\/div>\r\n <div class=\"form-group\">\r\n <label for=\"weight-kg\">Kilograms<\/label>\r\n <select id=\"weight-kg\">\r\n <option value=\"\">Select kilograms<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <\/div>\r\n <div class=\"unit-label\">Select weight in pounds OR kilograms<\/div>\r\n <\/div>\r\n \r\n <div class=\"warning-note\">\r\n <strong>\u26a0\ufe0f Important:<\/strong> This calculator provides basic BMI only. For accurate percentile results based on CDC growth charts, use the official CDC calculator.\r\n <\/div>\r\n \r\n <button class=\"calculate-btn\" onclick=\"calculateChildBMI()\">\r\n \ud83d\udcca CALCULATE BASIC BMI\r\n <\/button>\r\n <\/div>\r\n \r\n <div class=\"results\" id=\"results\">\r\n <h2>\ud83d\udcc8 Child BMI Results<\/h2>\r\n \r\n <div class=\"result-details\">\r\n <div class=\"detail-item\">\r\n <span class=\"detail-label\">Age:<\/span>\r\n <span class=\"detail-value\" id=\"age-display\">0 years 0 months<\/span>\r\n <\/div>\r\n <div class=\"detail-item\">\r\n <span class=\"detail-label\">Gender:<\/span>\r\n <span class=\"detail-value\" id=\"gender-display\">-<\/span>\r\n <\/div>\r\n <\/div>\r\n \r\n <h3>Basic BMI Calculation<\/h3>\r\n <div class=\"bmi-result\" id=\"bmi-value\">0.0<\/div>\r\n \r\n <div class=\"bmi-scale\"><\/div>\r\n <div class=\"scale-labels\">\r\n <span>Underweight<\/span>\r\n <span>Healthy<\/span>\r\n <span>Overweight<\/span>\r\n <span>Obese<\/span>\r\n <\/div>\r\n <div class=\"scale-note\">\r\n Note: Adult BMI categories shown for reference only. Child BMI requires percentile analysis.\r\n <\/div>\r\n \r\n <div class=\"info-box\">\r\n <h3>\ud83d\udcca Understanding Child BMI<\/h3>\r\n <p>For children and teens, <strong>BMI is interpreted differently than for adults<\/strong>. Instead of using fixed BMI categories, pediatricians use <strong>CDC growth chart percentiles<\/strong> that compare your child to others of the same age and sex.<\/p>\r\n \r\n <p><strong>Why percentiles matter:<\/strong><\/p>\r\n <ul>\r\n <li>Children's body composition changes with age<\/li>\r\n <li>Boys and girls develop at different rates<\/li>\r\n <li>Percentiles show where your child falls compared to peers<\/li>\r\n <li>Growth patterns over time are more important than single measurements<\/li>\r\n <\/ul>\r\n <\/div>\r\n \r\n <div class=\"cdc-recommendation\">\r\n <h3>\ud83c\udfaf For Accurate Percentile Results<\/h3>\r\n <p>This calculator provides only basic BMI. <strong>Accurate percentile calculation requires:<\/strong><\/p>\r\n <ul>\r\n <li>CDC's official growth chart data<\/li>\r\n <li>Complex statistical modeling (LMS method)<\/li>\r\n <li>Age- and sex-specific comparisons<\/li>\r\n <li>Professional interpretation tools<\/li>\r\n <\/ul>\r\n <\/div>\r\n \r\n <div class=\"cdc-link-box\">\r\n <h3>\ud83c\udfe5 Use Official CDC Calculator<\/h3>\r\n <p>For accurate BMI percentile results based on CDC growth charts:<\/p>\r\n <a href=\"https:\/\/www.cdc.gov\/bmi\/child-teen-calculator\/calculator.html\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n \u2197\ufe0f Go to CDC Child & Teen BMI Calculator\r\n <\/a>\r\n <p style=\"margin-top: 15px; font-size: 0.9rem; opacity: 0.9;\">\r\n Opens in new tab | Centers for Disease Control and Prevention\r\n <\/p>\r\n <\/div>\r\n \r\n <div class=\"warning-note\">\r\n <strong>\ud83d\udca1 Professional Guidance Recommended:<\/strong> BMI is a screening tool. For diagnosis, growth assessment, and treatment recommendations, consult a healthcare provider.\r\n <\/div>\r\n \r\n <button class=\"reset-btn\" onclick=\"resetCalculator()\">\r\n \ud83d\udd04 Calculate Again\r\n <\/button>\r\n <\/div>\r\n \r\n <div class=\"info-section\">\r\n <h3>\ud83d\udc76 Why Child BMI is Different<\/h3>\r\n <p>Unlike adult BMI which uses fixed categories, <strong>child and teen BMI is age- and sex-specific<\/strong>. Here's why:<\/p>\r\n \r\n <p><strong>1. Growth Patterns Vary:<\/strong><\/p>\r\n <ul>\r\n <li>Children grow at different rates<\/li>\r\n <li>BMI naturally changes with age<\/li>\r\n <li>Puberty affects body composition differently in boys and girls<\/li>\r\n <\/ul>\r\n \r\n <p><strong>2. Percentile-Based Assessment:<\/strong><\/p>\r\n <ul>\r\n <li>Compares child to national reference population<\/li>\r\n <li>Shows relative position (e.g., 75th percentile means heavier than 75% of peers)<\/li>\r\n <li>Allows tracking growth patterns over time<\/li>\r\n <\/ul>\r\n \r\n <p><strong>3. CDC Growth Charts:<\/strong><\/p>\r\n <ul>\r\n <li>Based on nationally representative data<\/li>\r\n <li>Updated in 2000 to reflect current population<\/li>\r\n <li>Used by healthcare professionals nationwide<\/li>\r\n <\/ul>\r\n \r\n <h3>\ud83d\udccb CDC Percentile Categories<\/h3>\r\n <p>Healthcare providers use these percentile ranges:<\/p>\r\n <ul>\r\n <li><strong>Underweight:<\/strong> Below 5th percentile<\/li>\r\n <li><strong>Healthy weight:<\/strong> 5th to 84th percentile<\/li>\r\n <li><strong>Overweight:<\/strong> 85th to 94th percentile<\/li>\r\n <li><strong>Obese:<\/strong> 95th percentile and above<\/li>\r\n <\/ul>\r\n \r\n <h3>\ud83c\udfe5 When to Seek Professional Advice<\/h3>\r\n <p>Consult a healthcare provider if:<\/p>\r\n <ul>\r\n <li>You're concerned about your child's growth<\/li>\r\n <li>Your child has rapid weight changes<\/li>\r\n <li>You want accurate growth assessment<\/li>\r\n <li>Your child has special health considerations<\/li>\r\n <\/ul>\r\n \r\n <div class=\"warning-note\">\r\n <p><strong>Disclaimer:<\/strong> This calculator provides basic BMI for informational purposes only. \r\n It is not a substitute for professional medical advice. Always consult a healthcare provider \r\n for growth assessment and health concerns.<\/p>\r\n \r\n <p style=\"margin-top: 10px;\"><strong>For accurate percentile results:<\/strong> Use the official \r\n <a href=\"https:\/\/www.cdc.gov\/bmi\/child-teen-calculator\/calculator.html\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n CDC Child & Teen BMI Calculator\r\n <\/a><\/p>\r\n <\/div>\r\n <\/div>\r\n \r\n <script>\r\n \/\/ Set max dates to today\r\n document.addEventListener('DOMContentLoaded', function() {\r\n const today = new Date().toISOString().split('T')[0];\r\n document.getElementById('birth-date').max = today;\r\n document.getElementById('measurement-date').max = today;\r\n \r\n \/\/ Set default dates (example: 8-year-old child)\r\n const defaultBirthDate = new Date();\r\n defaultBirthDate.setFullYear(defaultBirthDate.getFullYear() - 8);\r\n document.getElementById('birth-date').value = defaultBirthDate.toISOString().split('T')[0];\r\n document.getElementById('measurement-date').value = today;\r\n \r\n populateMeasurementDropdowns();\r\n });\r\n \r\n function populateMeasurementDropdowns() {\r\n \/\/ Height in feet (1 to 7 feet for children\/teens)\r\n const feetSelect = document.getElementById('height-feet');\r\n for (let i = 1; i <= 7; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' ft';\r\n feetSelect.appendChild(option);\r\n }\r\n \r\n \/\/ Height in inches (0 to 11 inches)\r\n const inchesSelect = document.getElementById('height-inches');\r\n for (let i = 0; i <= 11; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' in';\r\n inchesSelect.appendChild(option);\r\n }\r\n \r\n \/\/ Set defaults for a typical 8-year-old\r\n feetSelect.value = 4;\r\n inchesSelect.value = 2;\r\n \r\n \/\/ Height in cm (60 cm to 220 cm for children\/teens)\r\n const cmSelect = document.getElementById('height-cm');\r\n for (let i = 60; i <= 220; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' cm';\r\n cmSelect.appendChild(option);\r\n }\r\n \r\n \/\/ Weight in pounds (20 lbs to 300 lbs for children\/teens)\r\n const poundsSelect = document.getElementById('weight-pounds');\r\n for (let i = 20; i <= 300; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' lbs';\r\n poundsSelect.appendChild(option);\r\n }\r\n poundsSelect.value = 60;\r\n \r\n \/\/ Weight in kg (10 kg to 135 kg for children\/teens)\r\n const kgSelect = document.getElementById('weight-kg');\r\n for (let i = 10; i <= 135; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' kg';\r\n kgSelect.appendChild(option);\r\n }\r\n }\r\n \r\n function calculateAgeInMonths(birthDate, measurementDate) {\r\n const birth = new Date(birthDate);\r\n const measurement = new Date(measurementDate);\r\n \r\n let years = measurement.getFullYear() - birth.getFullYear();\r\n let months = measurement.getMonth() - birth.getMonth();\r\n \r\n \/\/ Adjust if measurement month is before birth month\r\n if (months < 0) {\r\n years--;\r\n months += 12;\r\n }\r\n \r\n \/\/ Adjust for day of month\r\n if (measurement.getDate() < birth.getDate()) {\r\n months--;\r\n if (months < 0) {\r\n years--;\r\n months += 12;\r\n }\r\n }\r\n \r\n const totalMonths = (years * 12) + months;\r\n \r\n return {\r\n years: years,\r\n months: months,\r\n totalMonths: totalMonths\r\n };\r\n }\r\n \r\n function calculateChildBMI() {\r\n \/\/ Get dates\r\n const birthDate = document.getElementById('birth-date').value;\r\n const measurementDate = document.getElementById('measurement-date').value;\r\n const gender = document.getElementById('gender').value;\r\n \r\n if (!birthDate || !measurementDate) {\r\n alert('Please enter both birth date and measurement date.');\r\n return;\r\n }\r\n \r\n \/\/ Calculate age\r\n const age = calculateAgeInMonths(birthDate, measurementDate);\r\n \r\n \/\/ Validate age range (2-19 years)\r\n if (age.years < 2 || age.years > 19) {\r\n alert('This calculator is for children and teens aged 2 to 19 years only.');\r\n return;\r\n }\r\n \r\n \/\/ Get height\r\n let heightCm;\r\n const feet = parseInt(document.getElementById('height-feet').value) || 0;\r\n const inches = parseInt(document.getElementById('height-inches').value) || 0;\r\n const cm = parseInt(document.getElementById('height-cm').value);\r\n \r\n if (cm && cm > 0) {\r\n heightCm = cm;\r\n } else if (feet > 0 || inches > 0) {\r\n const totalInches = (feet * 12) + inches;\r\n heightCm = totalInches * 2.54;\r\n } else {\r\n alert('Please select height.');\r\n return;\r\n }\r\n \r\n \/\/ Get weight\r\n let weightKg;\r\n const pounds = parseInt(document.getElementById('weight-pounds').value);\r\n const kg = parseInt(document.getElementById('weight-kg').value);\r\n \r\n if (kg && kg > 0) {\r\n weightKg = kg;\r\n } else if (pounds && pounds > 0) {\r\n weightKg = pounds * 0.453592;\r\n } else {\r\n alert('Please select weight.');\r\n return;\r\n }\r\n \r\n \/\/ Calculate BMI\r\n const heightMeters = heightCm \/ 100;\r\n const bmi = weightKg \/ (heightMeters * heightMeters);\r\n \r\n \/\/ Display results\r\n document.getElementById('age-display').textContent = \r\n `${age.years} years ${age.months} months`;\r\n \r\n document.getElementById('gender-display').textContent = \r\n gender === 'male' ? 'Male (Boy)' : 'Female (Girl)';\r\n \r\n document.getElementById('bmi-value').textContent = bmi.toFixed(1);\r\n \r\n \/\/ Show results\r\n document.getElementById('results').style.display = 'block';\r\n document.getElementById('results').scrollIntoView({behavior: 'smooth'});\r\n }\r\n \r\n function resetCalculator() {\r\n document.getElementById('results').style.display = 'none';\r\n \r\n \/\/ Reset to defaults\r\n const today = new Date().toISOString().split('T')[0];\r\n const defaultBirthDate = new Date();\r\n defaultBirthDate.setFullYear(defaultBirthDate.getFullYear() - 8);\r\n \r\n document.getElementById('birth-date').value = defaultBirthDate.toISOString().split('T')[0];\r\n document.getElementById('measurement-date').value = today;\r\n document.getElementById('gender').value = 'male';\r\n document.getElementById('height-feet').value = 4;\r\n document.getElementById('height-inches').value = 2;\r\n document.getElementById('height-cm').value = '';\r\n document.getElementById('weight-pounds').value = 60;\r\n document.getElementById('weight-kg').value = '';\r\n \r\n window.scrollTo({top: 0, behavior: 'smooth'});\r\n }\r\n \r\n \/\/ Auto-clear functions\r\n document.getElementById('height-feet').addEventListener('change', function() {\r\n if (this.value) document.getElementById('height-cm').value = '';\r\n });\r\n \r\n document.getElementById('height-inches').addEventListener('change', function() {\r\n if (this.value && !document.getElementById('height-feet').value) {\r\n document.getElementById('height-feet').value = 4;\r\n }\r\n if (this.value) document.getElementById('height-cm').value = '';\r\n });\r\n \r\n document.getElementById('height-cm').addEventListener('change', function() {\r\n if (this.value) {\r\n document.getElementById('height-feet').value = '';\r\n document.getElementById('height-inches').value = '';\r\n }\r\n });\r\n \r\n document.getElementById('weight-pounds').addEventListener('change', function() {\r\n if (this.value) document.getElementById('weight-kg').value = '';\r\n });\r\n \r\n document.getElementById('weight-kg').addEventListener('change', function() {\r\n if (this.value) document.getElementById('weight-pounds').value = '';\r\n });\r\n \r\n \/\/ Enter key support\r\n document.addEventListener('keypress', function(e) {\r\n if (e.key === 'Enter') calculateChildBMI();\r\n });\r\n <\/script>\r\n<\/body>\r\n<\/html>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3929bbf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3929bbf\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bbfeb8e\" data-id=\"bbfeb8e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-64d49c1 elementor-widget elementor-widget-text-editor\" data-id=\"64d49c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>People 20 and older should use the\u00a0<span style=\"text-decoration: underline;\">Adult BMI Calculator.<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09cc27d elementor-widget elementor-widget-text-editor\" data-id=\"09cc27d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/goodworld.in\/international\/bmi-calulator\/\"><span style=\"text-decoration: underline;\"><strong>Link to Adult BMI Calculator<\/strong><\/span><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-775ddb9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"775ddb9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-aa61cbd\" data-id=\"aa61cbd\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e3527fe elementor-widget elementor-widget-mygoodworld_gallery\" data-id=\"e3527fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"mygoodworld_gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t <div class=\"mygoodworld-gallery\" \r\n data-columns=\"3\"\r\n data-gap=\"10\"\r\n data-copyright=\"false\"\r\n data-copyright-text=\"\"\r\n style=\"gap: 10px;\">\r\n \r\n <div class=\"mygoodworld-gallery-item\" \r\n style=\"border-radius: 5px;\">\r\n <img decoding=\"async\" src=\"https:\/\/goodworld.in\/international\/wp-content\/uploads\/2025\/12\/bmr-calculator-300x300.jpeg\" \r\n alt=\"bmr-calculator\"\r\n data-image-id=\"537\"\r\n data-full-url=\"https:\/\/goodworld.in\/international\/wp-content\/uploads\/2025\/12\/bmr-calculator.jpeg\"\r\n style=\"border-radius: 5px;\">\r\n <\/div>\r\n <\/div>\r\n \r\n <div class=\"mygoodworld-lightbox\" style=\"display: none;\">\r\n <div class=\"mygoodworld-lightbox-overlay\"><\/div>\r\n <div class=\"mygoodworld-lightbox-content\">\r\n <span class=\"mygoodworld-lightbox-close\">×<\/span>\r\n <img decoding=\"async\" src=\"\" alt=\"\" class=\"mygoodworld-lightbox-image\">\r\n <div class=\"mygoodworld-lightbox-buttons\">\r\n <button class=\"mygoodworld-download-btn\" data-format=\"original\">\r\n Download Original\r\n <\/button>\r\n <button class=\"mygoodworld-download-btn\" data-format=\"jpg\">\r\n Download JPG\r\n <\/button>\r\n <button class=\"mygoodworld-download-btn\" data-format=\"png\">\r\n Download PNG\r\n <\/button>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Child and Teen BMI Calculator Body mass index (BMI) is a measure of weight relative to height. For children and teens, BMI is interpreted using sex-specific BMI-for-age percentiles. This calculator reports BMI, BMI percentile, and BMI category for children and teens 2 through 19. Child & Teen BMI Calculator | CDC Guidelines \ud83d\udc76 Child & … <a title=\"Child and Teen BMI Calculator\" class=\"read-more\" href=\"https:\/\/goodworld.in\/international\/child-and-teen-bmi-calculator\/\" aria-label=\"Read more about Child and Teen BMI Calculator\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":534,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[31],"tags":[266,264,265,218,216,263,259,268,199,272,262,258,270,257,256,267,261,217,260,269,271],"class_list":["post-487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tools","tag-adolescent-health","tag-bmi-percentile","tag-cdc-growth-charts","tag-child-and-teen-bmi-calculator","tag-child-bmi-calculator","tag-child-development","tag-child-health","tag-child-weight","tag-childrens-health","tag-family-health-tool","tag-growth-assessment","tag-growth-chart-calculator","tag-growth-monitoring","tag-kids-health-calculator","tag-pediatric-bmi","tag-pediatric-calculator","tag-pediatric-health","tag-teen-bmi-calculator","tag-teen-health","tag-teen-weight","tag-youth-health"],"jetpack_featured_media_url":"https:\/\/goodworld.in\/international\/wp-content\/uploads\/2025\/12\/child-and-teen-bmi-calculator.jpeg","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pgSPO2-7R","_links":{"self":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts\/487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/comments?post=487"}],"version-history":[{"count":39,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts\/487\/revisions"}],"predecessor-version":[{"id":17986,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts\/487\/revisions\/17986"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/media\/534"}],"wp:attachment":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/media?parent=487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/categories?post=487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/tags?post=487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

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Child and Teen BMI Calculator<\/p>

Body mass index (BMI) is a measure of weight relative to height. For children and teens, BMI is interpreted using sex-specific BMI-for-age percentiles. This calculator reports BMI, BMI percentile, and BMI category for children and teens 2 through 19.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t\t\r\n\r\n\r\n Child & Teen BMI Calculator | CDC Guidelines<\/title>\r\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\r\n <meta name=\"description\" content=\"Calculate BMI for children and teens (ages 2-19). Get basic BMI results and learn about CDC growth chart percentiles.\">\r\n <style>\r\n * {\r\n box-sizing: border-box;\r\n }\r\n body {\r\n font-family: 'Arial', sans-serif;\r\n max-width: 800px;\r\n margin: 0 auto;\r\n padding: 20px;\r\n background-color: #f0f8ff;\r\n color: #333;\r\n line-height: 1.6;\r\n }\r\n .calculator-container {\r\n background: linear-gradient(135deg, #36d1dc 0%, #5b86e5 100%);\r\n border-radius: 15px;\r\n padding: 30px;\r\n color: white;\r\n box-shadow: 0 10px 30px rgba(0,0,0,0.2);\r\n margin-bottom: 30px;\r\n }\r\n h1 {\r\n text-align: center;\r\n margin-bottom: 10px;\r\n font-size: 2.5rem;\r\n text-shadow: 2px 2px 4px rgba(0,0,0,0.3);\r\n }\r\n .subtitle {\r\n text-align: center;\r\n font-size: 1.1rem;\r\n opacity: 0.9;\r\n margin-bottom: 30px;\r\n }\r\n .form-group {\r\n margin-bottom: 20px;\r\n }\r\n label {\r\n display: block;\r\n margin-bottom: 8px;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n }\r\n select, input[type=\"date\"] {\r\n width: 100%;\r\n padding: 12px;\r\n border: none;\r\n border-radius: 8px;\r\n font-size: 1rem;\r\n background: rgba(255,255,255,0.9);\r\n }\r\n .form-row {\r\n display: grid;\r\n grid-template-columns: 1fr 1fr;\r\n gap: 20px;\r\n }\r\n @media (max-width: 600px) {\r\n .form-row {\r\n grid-template-columns: 1fr;\r\n }\r\n }\r\n .measurement-group {\r\n background: rgba(255,255,255,0.1);\r\n padding: 20px;\r\n border-radius: 8px;\r\n margin-bottom: 15px;\r\n }\r\n .height-inputs {\r\n display: grid;\r\n grid-template-columns: 1fr 1fr;\r\n gap: 10px;\r\n margin-bottom: 10px;\r\n }\r\n .unit-label {\r\n font-size: 0.9rem;\r\n opacity: 0.8;\r\n margin-top: 5px;\r\n text-align: center;\r\n }\r\n .calculate-btn {\r\n background: #ff9a3c;\r\n color: white;\r\n border: none;\r\n padding: 15px 30px;\r\n font-size: 1.2rem;\r\n border-radius: 50px;\r\n cursor: pointer;\r\n width: 100%;\r\n margin-top: 20px;\r\n font-weight: bold;\r\n transition: all 0.3s ease;\r\n box-shadow: 0 5px 15px rgba(255,154,60,0.4);\r\n }\r\n .calculate-btn:hover {\r\n background: #ff7b00;\r\n transform: translateY(-3px);\r\n box-shadow: 0 8px 20px rgba(255,154,60,0.6);\r\n }\r\n .results {\r\n display: none;\r\n background: white;\r\n color: #333;\r\n padding: 25px;\r\n border-radius: 10px;\r\n margin-top: 30px;\r\n box-shadow: 0 5px 15px rgba(0,0,0,0.1);\r\n }\r\n .bmi-result {\r\n font-size: 3.5rem;\r\n font-weight: bold;\r\n text-align: center;\r\n margin: 20px 0;\r\n color: #36d1dc;\r\n }\r\n .info-box {\r\n background: rgba(54, 209, 220, 0.1);\r\n padding: 20px;\r\n border-radius: 10px;\r\n margin: 20px 0;\r\n border-left: 4px solid #36d1dc;\r\n }\r\n .cdc-recommendation {\r\n background: rgba(76, 175, 80, 0.1);\r\n padding: 20px;\r\n border-radius: 10px;\r\n margin: 20px 0;\r\n border-left: 4px solid #4CAF50;\r\n }\r\n .cdc-link-box {\r\n text-align: center;\r\n padding: 25px;\r\n background: linear-gradient(135deg, #36d1dc 0%, #5b86e5 100%);\r\n border-radius: 10px;\r\n margin: 25px 0;\r\n color: white;\r\n }\r\n .cdc-link-box a {\r\n color: white;\r\n background: #ff9a3c;\r\n padding: 12px 30px;\r\n border-radius: 50px;\r\n text-decoration: none;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n display: inline-block;\r\n margin-top: 15px;\r\n transition: all 0.3s ease;\r\n }\r\n .cdc-link-box a:hover {\r\n background: #ff7b00;\r\n transform: translateY(-2px);\r\n box-shadow: 0 5px 15px rgba(255,154,60,0.4);\r\n }\r\n .info-section {\r\n background: white;\r\n padding: 25px;\r\n border-radius: 10px;\r\n margin-top: 30px;\r\n box-shadow: 0 5px 15px rgba(0,0,0,0.1);\r\n }\r\n .info-section h3 {\r\n color: #36d1dc;\r\n margin-top: 0;\r\n }\r\n .reset-btn {\r\n background: #4CAF50;\r\n color: white;\r\n border: none;\r\n padding: 12px 25px;\r\n border-radius: 50px;\r\n cursor: pointer;\r\n margin-top: 20px;\r\n font-weight: bold;\r\n display: inline-block;\r\n transition: all 0.3s ease;\r\n }\r\n .reset-btn:hover {\r\n background: #45a049;\r\n transform: translateY(-2px);\r\n }\r\n .or-divider {\r\n text-align: center;\r\n margin: 10px 0;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n }\r\n .measurement-system {\r\n margin-bottom: 15px;\r\n font-weight: bold;\r\n font-size: 1.1rem;\r\n }\r\n .age-group {\r\n background: rgba(255,255,255,0.1);\r\n padding: 15px;\r\n border-radius: 8px;\r\n margin-bottom: 20px;\r\n }\r\n .warning-note {\r\n background: rgba(255, 152, 0, 0.2);\r\n border-left: 4px solid #ff9800;\r\n padding: 15px;\r\n margin: 20px 0;\r\n border-radius: 4px;\r\n }\r\n .bmi-scale {\r\n height: 25px;\r\n background: linear-gradient(to right, #36d1dc, #4caf50, #ff9800, #f44336);\r\n border-radius: 12px;\r\n margin: 25px 0;\r\n position: relative;\r\n }\r\n .scale-labels {\r\n display: flex;\r\n justify-content: space-between;\r\n font-size: 0.9rem;\r\n color: #666;\r\n margin-top: 8px;\r\n font-weight: bold;\r\n }\r\n .scale-note {\r\n text-align: center;\r\n font-size: 0.85rem;\r\n color: #666;\r\n margin-top: 5px;\r\n font-style: italic;\r\n }\r\n .age-input-note {\r\n font-size: 0.85rem;\r\n opacity: 0.8;\r\n margin-top: 5px;\r\n text-align: center;\r\n }\r\n .result-details {\r\n margin: 20px 0;\r\n }\r\n .detail-item {\r\n display: flex;\r\n justify-content: space-between;\r\n padding: 12px 0;\r\n border-bottom: 1px solid #eee;\r\n }\r\n .detail-item:last-child {\r\n border-bottom: none;\r\n }\r\n .detail-label {\r\n font-weight: bold;\r\n color: #555;\r\n }\r\n .detail-value {\r\n font-weight: bold;\r\n color: #36d1dc;\r\n }\r\n <\/style>\r\n<\/head>\r\n<body>\r\n <div class=\"calculator-container\">\r\n <h1>\ud83d\udc76 Child & Teen BMI Calculator<\/h1>\r\n <p class=\"subtitle\">For ages 2-19 years | Calculate Basic BMI (For percentile results, use CDC calculator)<\/p>\r\n \r\n <div class=\"age-group\">\r\n <div class=\"form-row\">\r\n <div class=\"form-group\">\r\n <label for=\"birth-date\">Child's Birth Date<\/label>\r\n <input type=\"date\" id=\"birth-date\" max=\"\">\r\n <\/div>\r\n <div class=\"form-group\">\r\n <label for=\"measurement-date\">Measurement Date<\/label>\r\n <input type=\"date\" id=\"measurement-date\" max=\"\">\r\n <\/div>\r\n <\/div>\r\n <div class=\"form-group\">\r\n <label for=\"gender\">Gender<\/label>\r\n <select id=\"gender\">\r\n <option value=\"male\">Male (Boy)<\/option>\r\n <option value=\"female\">Female (Girl)<\/option>\r\n <\/select>\r\n <\/div>\r\n <\/div>\r\n \r\n <div class=\"measurement-group\">\r\n <div class=\"measurement-system\">Height<\/div>\r\n <div class=\"height-inputs\">\r\n <div class=\"form-group\">\r\n <label for=\"height-feet\">Feet<\/label>\r\n <select id=\"height-feet\">\r\n <option value=\"\">Select feet<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <div class=\"form-group\">\r\n <label for=\"height-inches\">Inches<\/label>\r\n <select id=\"height-inches\">\r\n <option value=\"\">Select inches<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <\/div>\r\n <div class=\"or-divider\">OR<\/div>\r\n <div class=\"form-group\">\r\n <label for=\"height-cm\">Centimeters<\/label>\r\n <select id=\"height-cm\">\r\n <option value=\"\">Select centimeters<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <div class=\"unit-label\">Select height in feet\/inches OR centimeters<\/div>\r\n <\/div>\r\n \r\n <div class=\"measurement-group\">\r\n <div class=\"measurement-system\">Weight<\/div>\r\n <div class=\"form-row\">\r\n <div class=\"form-group\">\r\n <label for=\"weight-pounds\">Pounds<\/label>\r\n <select id=\"weight-pounds\">\r\n <option value=\"\">Select pounds<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <div class=\"or-divider\" style=\"margin: auto 0;\">OR<\/div>\r\n <div class=\"form-group\">\r\n <label for=\"weight-kg\">Kilograms<\/label>\r\n <select id=\"weight-kg\">\r\n <option value=\"\">Select kilograms<\/option>\r\n \r\n <\/select>\r\n <\/div>\r\n <\/div>\r\n <div class=\"unit-label\">Select weight in pounds OR kilograms<\/div>\r\n <\/div>\r\n \r\n <div class=\"warning-note\">\r\n <strong>\u26a0\ufe0f Important:<\/strong> This calculator provides basic BMI only. For accurate percentile results based on CDC growth charts, use the official CDC calculator.\r\n <\/div>\r\n \r\n <button class=\"calculate-btn\" onclick=\"calculateChildBMI()\">\r\n \ud83d\udcca CALCULATE BASIC BMI\r\n <\/button>\r\n <\/div>\r\n \r\n <div class=\"results\" id=\"results\">\r\n <h2>\ud83d\udcc8 Child BMI Results<\/h2>\r\n \r\n <div class=\"result-details\">\r\n <div class=\"detail-item\">\r\n <span class=\"detail-label\">Age:<\/span>\r\n <span class=\"detail-value\" id=\"age-display\">0 years 0 months<\/span>\r\n <\/div>\r\n <div class=\"detail-item\">\r\n <span class=\"detail-label\">Gender:<\/span>\r\n <span class=\"detail-value\" id=\"gender-display\">-<\/span>\r\n <\/div>\r\n <\/div>\r\n \r\n <h3>Basic BMI Calculation<\/h3>\r\n <div class=\"bmi-result\" id=\"bmi-value\">0.0<\/div>\r\n \r\n <div class=\"bmi-scale\"><\/div>\r\n <div class=\"scale-labels\">\r\n <span>Underweight<\/span>\r\n <span>Healthy<\/span>\r\n <span>Overweight<\/span>\r\n <span>Obese<\/span>\r\n <\/div>\r\n <div class=\"scale-note\">\r\n Note: Adult BMI categories shown for reference only. Child BMI requires percentile analysis.\r\n <\/div>\r\n \r\n <div class=\"info-box\">\r\n <h3>\ud83d\udcca Understanding Child BMI<\/h3>\r\n <p>For children and teens, <strong>BMI is interpreted differently than for adults<\/strong>. Instead of using fixed BMI categories, pediatricians use <strong>CDC growth chart percentiles<\/strong> that compare your child to others of the same age and sex.<\/p>\r\n \r\n <p><strong>Why percentiles matter:<\/strong><\/p>\r\n <ul>\r\n <li>Children's body composition changes with age<\/li>\r\n <li>Boys and girls develop at different rates<\/li>\r\n <li>Percentiles show where your child falls compared to peers<\/li>\r\n <li>Growth patterns over time are more important than single measurements<\/li>\r\n <\/ul>\r\n <\/div>\r\n \r\n <div class=\"cdc-recommendation\">\r\n <h3>\ud83c\udfaf For Accurate Percentile Results<\/h3>\r\n <p>This calculator provides only basic BMI. <strong>Accurate percentile calculation requires:<\/strong><\/p>\r\n <ul>\r\n <li>CDC's official growth chart data<\/li>\r\n <li>Complex statistical modeling (LMS method)<\/li>\r\n <li>Age- and sex-specific comparisons<\/li>\r\n <li>Professional interpretation tools<\/li>\r\n <\/ul>\r\n <\/div>\r\n \r\n <div class=\"cdc-link-box\">\r\n <h3>\ud83c\udfe5 Use Official CDC Calculator<\/h3>\r\n <p>For accurate BMI percentile results based on CDC growth charts:<\/p>\r\n <a href=\"https:\/\/www.cdc.gov\/bmi\/child-teen-calculator\/calculator.html\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n \u2197\ufe0f Go to CDC Child & Teen BMI Calculator\r\n <\/a>\r\n <p style=\"margin-top: 15px; font-size: 0.9rem; opacity: 0.9;\">\r\n Opens in new tab | Centers for Disease Control and Prevention\r\n <\/p>\r\n <\/div>\r\n \r\n <div class=\"warning-note\">\r\n <strong>\ud83d\udca1 Professional Guidance Recommended:<\/strong> BMI is a screening tool. For diagnosis, growth assessment, and treatment recommendations, consult a healthcare provider.\r\n <\/div>\r\n \r\n <button class=\"reset-btn\" onclick=\"resetCalculator()\">\r\n \ud83d\udd04 Calculate Again\r\n <\/button>\r\n <\/div>\r\n \r\n <div class=\"info-section\">\r\n <h3>\ud83d\udc76 Why Child BMI is Different<\/h3>\r\n <p>Unlike adult BMI which uses fixed categories, <strong>child and teen BMI is age- and sex-specific<\/strong>. Here's why:<\/p>\r\n \r\n <p><strong>1. Growth Patterns Vary:<\/strong><\/p>\r\n <ul>\r\n <li>Children grow at different rates<\/li>\r\n <li>BMI naturally changes with age<\/li>\r\n <li>Puberty affects body composition differently in boys and girls<\/li>\r\n <\/ul>\r\n \r\n <p><strong>2. Percentile-Based Assessment:<\/strong><\/p>\r\n <ul>\r\n <li>Compares child to national reference population<\/li>\r\n <li>Shows relative position (e.g., 75th percentile means heavier than 75% of peers)<\/li>\r\n <li>Allows tracking growth patterns over time<\/li>\r\n <\/ul>\r\n \r\n <p><strong>3. CDC Growth Charts:<\/strong><\/p>\r\n <ul>\r\n <li>Based on nationally representative data<\/li>\r\n <li>Updated in 2000 to reflect current population<\/li>\r\n <li>Used by healthcare professionals nationwide<\/li>\r\n <\/ul>\r\n \r\n <h3>\ud83d\udccb CDC Percentile Categories<\/h3>\r\n <p>Healthcare providers use these percentile ranges:<\/p>\r\n <ul>\r\n <li><strong>Underweight:<\/strong> Below 5th percentile<\/li>\r\n <li><strong>Healthy weight:<\/strong> 5th to 84th percentile<\/li>\r\n <li><strong>Overweight:<\/strong> 85th to 94th percentile<\/li>\r\n <li><strong>Obese:<\/strong> 95th percentile and above<\/li>\r\n <\/ul>\r\n \r\n <h3>\ud83c\udfe5 When to Seek Professional Advice<\/h3>\r\n <p>Consult a healthcare provider if:<\/p>\r\n <ul>\r\n <li>You're concerned about your child's growth<\/li>\r\n <li>Your child has rapid weight changes<\/li>\r\n <li>You want accurate growth assessment<\/li>\r\n <li>Your child has special health considerations<\/li>\r\n <\/ul>\r\n \r\n <div class=\"warning-note\">\r\n <p><strong>Disclaimer:<\/strong> This calculator provides basic BMI for informational purposes only. \r\n It is not a substitute for professional medical advice. Always consult a healthcare provider \r\n for growth assessment and health concerns.<\/p>\r\n \r\n <p style=\"margin-top: 10px;\"><strong>For accurate percentile results:<\/strong> Use the official \r\n <a href=\"https:\/\/www.cdc.gov\/bmi\/child-teen-calculator\/calculator.html\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n CDC Child & Teen BMI Calculator\r\n <\/a><\/p>\r\n <\/div>\r\n <\/div>\r\n \r\n <script>\r\n \/\/ Set max dates to today\r\n document.addEventListener('DOMContentLoaded', function() {\r\n const today = new Date().toISOString().split('T')[0];\r\n document.getElementById('birth-date').max = today;\r\n document.getElementById('measurement-date').max = today;\r\n \r\n \/\/ Set default dates (example: 8-year-old child)\r\n const defaultBirthDate = new Date();\r\n defaultBirthDate.setFullYear(defaultBirthDate.getFullYear() - 8);\r\n document.getElementById('birth-date').value = defaultBirthDate.toISOString().split('T')[0];\r\n document.getElementById('measurement-date').value = today;\r\n \r\n populateMeasurementDropdowns();\r\n });\r\n \r\n function populateMeasurementDropdowns() {\r\n \/\/ Height in feet (1 to 7 feet for children\/teens)\r\n const feetSelect = document.getElementById('height-feet');\r\n for (let i = 1; i <= 7; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' ft';\r\n feetSelect.appendChild(option);\r\n }\r\n \r\n \/\/ Height in inches (0 to 11 inches)\r\n const inchesSelect = document.getElementById('height-inches');\r\n for (let i = 0; i <= 11; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' in';\r\n inchesSelect.appendChild(option);\r\n }\r\n \r\n \/\/ Set defaults for a typical 8-year-old\r\n feetSelect.value = 4;\r\n inchesSelect.value = 2;\r\n \r\n \/\/ Height in cm (60 cm to 220 cm for children\/teens)\r\n const cmSelect = document.getElementById('height-cm');\r\n for (let i = 60; i <= 220; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' cm';\r\n cmSelect.appendChild(option);\r\n }\r\n \r\n \/\/ Weight in pounds (20 lbs to 300 lbs for children\/teens)\r\n const poundsSelect = document.getElementById('weight-pounds');\r\n for (let i = 20; i <= 300; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' lbs';\r\n poundsSelect.appendChild(option);\r\n }\r\n poundsSelect.value = 60;\r\n \r\n \/\/ Weight in kg (10 kg to 135 kg for children\/teens)\r\n const kgSelect = document.getElementById('weight-kg');\r\n for (let i = 10; i <= 135; i++) {\r\n const option = document.createElement('option');\r\n option.value = i;\r\n option.textContent = i + ' kg';\r\n kgSelect.appendChild(option);\r\n }\r\n }\r\n \r\n function calculateAgeInMonths(birthDate, measurementDate) {\r\n const birth = new Date(birthDate);\r\n const measurement = new Date(measurementDate);\r\n \r\n let years = measurement.getFullYear() - birth.getFullYear();\r\n let months = measurement.getMonth() - birth.getMonth();\r\n \r\n \/\/ Adjust if measurement month is before birth month\r\n if (months < 0) {\r\n years--;\r\n months += 12;\r\n }\r\n \r\n \/\/ Adjust for day of month\r\n if (measurement.getDate() < birth.getDate()) {\r\n months--;\r\n if (months < 0) {\r\n years--;\r\n months += 12;\r\n }\r\n }\r\n \r\n const totalMonths = (years * 12) + months;\r\n \r\n return {\r\n years: years,\r\n months: months,\r\n totalMonths: totalMonths\r\n };\r\n }\r\n \r\n function calculateChildBMI() {\r\n \/\/ Get dates\r\n const birthDate = document.getElementById('birth-date').value;\r\n const measurementDate = document.getElementById('measurement-date').value;\r\n const gender = document.getElementById('gender').value;\r\n \r\n if (!birthDate || !measurementDate) {\r\n alert('Please enter both birth date and measurement date.');\r\n return;\r\n }\r\n \r\n \/\/ Calculate age\r\n const age = calculateAgeInMonths(birthDate, measurementDate);\r\n \r\n \/\/ Validate age range (2-19 years)\r\n if (age.years < 2 || age.years > 19) {\r\n alert('This calculator is for children and teens aged 2 to 19 years only.');\r\n return;\r\n }\r\n \r\n \/\/ Get height\r\n let heightCm;\r\n const feet = parseInt(document.getElementById('height-feet').value) || 0;\r\n const inches = parseInt(document.getElementById('height-inches').value) || 0;\r\n const cm = parseInt(document.getElementById('height-cm').value);\r\n \r\n if (cm && cm > 0) {\r\n heightCm = cm;\r\n } else if (feet > 0 || inches > 0) {\r\n const totalInches = (feet * 12) + inches;\r\n heightCm = totalInches * 2.54;\r\n } else {\r\n alert('Please select height.');\r\n return;\r\n }\r\n \r\n \/\/ Get weight\r\n let weightKg;\r\n const pounds = parseInt(document.getElementById('weight-pounds').value);\r\n const kg = parseInt(document.getElementById('weight-kg').value);\r\n \r\n if (kg && kg > 0) {\r\n weightKg = kg;\r\n } else if (pounds && pounds > 0) {\r\n weightKg = pounds * 0.453592;\r\n } else {\r\n alert('Please select weight.');\r\n return;\r\n }\r\n \r\n \/\/ Calculate BMI\r\n const heightMeters = heightCm \/ 100;\r\n const bmi = weightKg \/ (heightMeters * heightMeters);\r\n \r\n \/\/ Display results\r\n document.getElementById('age-display').textContent = \r\n `${age.years} years ${age.months} months`;\r\n \r\n document.getElementById('gender-display').textContent = \r\n gender === 'male' ? 'Male (Boy)' : 'Female (Girl)';\r\n \r\n document.getElementById('bmi-value').textContent = bmi.toFixed(1);\r\n \r\n \/\/ Show results\r\n document.getElementById('results').style.display = 'block';\r\n document.getElementById('results').scrollIntoView({behavior: 'smooth'});\r\n }\r\n \r\n function resetCalculator() {\r\n document.getElementById('results').style.display = 'none';\r\n \r\n \/\/ Reset to defaults\r\n const today = new Date().toISOString().split('T')[0];\r\n const defaultBirthDate = new Date();\r\n defaultBirthDate.setFullYear(defaultBirthDate.getFullYear() - 8);\r\n \r\n document.getElementById('birth-date').value = defaultBirthDate.toISOString().split('T')[0];\r\n document.getElementById('measurement-date').value = today;\r\n document.getElementById('gender').value = 'male';\r\n document.getElementById('height-feet').value = 4;\r\n document.getElementById('height-inches').value = 2;\r\n document.getElementById('height-cm').value = '';\r\n document.getElementById('weight-pounds').value = 60;\r\n document.getElementById('weight-kg').value = '';\r\n \r\n window.scrollTo({top: 0, behavior: 'smooth'});\r\n }\r\n \r\n \/\/ Auto-clear functions\r\n document.getElementById('height-feet').addEventListener('change', function() {\r\n if (this.value) document.getElementById('height-cm').value = '';\r\n });\r\n \r\n document.getElementById('height-inches').addEventListener('change', function() {\r\n if (this.value && !document.getElementById('height-feet').value) {\r\n document.getElementById('height-feet').value = 4;\r\n }\r\n if (this.value) document.getElementById('height-cm').value = '';\r\n });\r\n \r\n document.getElementById('height-cm').addEventListener('change', function() {\r\n if (this.value) {\r\n document.getElementById('height-feet').value = '';\r\n document.getElementById('height-inches').value = '';\r\n }\r\n });\r\n \r\n document.getElementById('weight-pounds').addEventListener('change', function() {\r\n if (this.value) document.getElementById('weight-kg').value = '';\r\n });\r\n \r\n document.getElementById('weight-kg').addEventListener('change', function() {\r\n if (this.value) document.getElementById('weight-pounds').value = '';\r\n });\r\n \r\n \/\/ Enter key support\r\n document.addEventListener('keypress', function(e) {\r\n if (e.key === 'Enter') calculateChildBMI();\r\n });\r\n <\/script>\r\n<\/body>\r\n<\/html>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3929bbf elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3929bbf\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-bbfeb8e\" data-id=\"bbfeb8e\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-64d49c1 elementor-widget elementor-widget-text-editor\" data-id=\"64d49c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong>People 20 and older should use the\u00a0<span style=\"text-decoration: underline;\">Adult BMI Calculator.<\/span><\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-09cc27d elementor-widget elementor-widget-text-editor\" data-id=\"09cc27d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><a href=\"https:\/\/goodworld.in\/international\/bmi-calulator\/\"><span style=\"text-decoration: underline;\"><strong>Link to Adult BMI Calculator<\/strong><\/span><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-775ddb9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"775ddb9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-aa61cbd\" data-id=\"aa61cbd\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e3527fe elementor-widget elementor-widget-mygoodworld_gallery\" data-id=\"e3527fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"mygoodworld_gallery.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t <div class=\"mygoodworld-gallery\" \r\n data-columns=\"3\"\r\n data-gap=\"10\"\r\n data-copyright=\"false\"\r\n data-copyright-text=\"\"\r\n style=\"gap: 10px;\">\r\n \r\n <div class=\"mygoodworld-gallery-item\" \r\n style=\"border-radius: 5px;\">\r\n <img decoding=\"async\" src=\"https:\/\/goodworld.in\/international\/wp-content\/uploads\/2025\/12\/bmr-calculator-300x300.jpeg\" \r\n alt=\"bmr-calculator\"\r\n data-image-id=\"537\"\r\n data-full-url=\"https:\/\/goodworld.in\/international\/wp-content\/uploads\/2025\/12\/bmr-calculator.jpeg\"\r\n style=\"border-radius: 5px;\">\r\n <\/div>\r\n <\/div>\r\n \r\n <div class=\"mygoodworld-lightbox\" style=\"display: none;\">\r\n <div class=\"mygoodworld-lightbox-overlay\"><\/div>\r\n <div class=\"mygoodworld-lightbox-content\">\r\n <span class=\"mygoodworld-lightbox-close\">×<\/span>\r\n <img decoding=\"async\" src=\"\" alt=\"\" class=\"mygoodworld-lightbox-image\">\r\n <div class=\"mygoodworld-lightbox-buttons\">\r\n <button class=\"mygoodworld-download-btn\" data-format=\"original\">\r\n Download Original\r\n <\/button>\r\n <button class=\"mygoodworld-download-btn\" data-format=\"jpg\">\r\n Download JPG\r\n <\/button>\r\n <button class=\"mygoodworld-download-btn\" data-format=\"png\">\r\n Download PNG\r\n <\/button>\r\n <\/div>\r\n <\/div>\r\n <\/div>\r\n \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Child and Teen BMI Calculator Body mass index (BMI) is a measure of weight relative to height. For children and teens, BMI is interpreted using sex-specific BMI-for-age percentiles. This calculator reports BMI, BMI percentile, and BMI category for children and teens 2 through 19. Child & Teen BMI Calculator | CDC Guidelines \ud83d\udc76 Child & … <a title=\"Child and Teen BMI Calculator\" class=\"read-more\" href=\"https:\/\/goodworld.in\/international\/child-and-teen-bmi-calculator\/\" aria-label=\"Read more about Child and Teen BMI Calculator\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":534,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[31],"tags":[266,264,265,218,216,263,259,268,199,272,262,258,270,257,256,267,261,217,260,269,271],"class_list":["post-487","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tools","tag-adolescent-health","tag-bmi-percentile","tag-cdc-growth-charts","tag-child-and-teen-bmi-calculator","tag-child-bmi-calculator","tag-child-development","tag-child-health","tag-child-weight","tag-childrens-health","tag-family-health-tool","tag-growth-assessment","tag-growth-chart-calculator","tag-growth-monitoring","tag-kids-health-calculator","tag-pediatric-bmi","tag-pediatric-calculator","tag-pediatric-health","tag-teen-bmi-calculator","tag-teen-health","tag-teen-weight","tag-youth-health"],"jetpack_featured_media_url":"https:\/\/goodworld.in\/international\/wp-content\/uploads\/2025\/12\/child-and-teen-bmi-calculator.jpeg","jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/pgSPO2-7R","_links":{"self":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts\/487","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/comments?post=487"}],"version-history":[{"count":39,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts\/487\/revisions"}],"predecessor-version":[{"id":17986,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/posts\/487\/revisions\/17986"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/media\/534"}],"wp:attachment":[{"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/media?parent=487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/categories?post=487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/goodworld.in\/international\/wp-json\/wp\/v2\/tags?post=487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}