BMI Percentile Calculator for Child and Teen
This calculator provides body mass index (BMI) and the corresponding BMI-for-age percentile based on CDC growth charts for children and teens ages 2 through 19 years. Because of possible rounding errors in age, weight, and height, the results from this calculator may differ slightly from BMI-for-age percentiles calculated by other programs.
For people 20 years old and older, use the Adult BMI Calculator.
Please check the accuracy of the information you entered.
Based on the Date of Birth and Date of Measurement, the calculated age is less than 2 years. Only use this calculator if the child is between 2 and 19 years old.
Based on the Date of Birth and Date of Measurement, the calculated age is 20 years or older. Only use this calculator if the person is between 2 and 19 years old. If the dates you entered are correct, use the Adult BMI Calculator.
Age must be between 2 and 19 years. If the child is under 2 years old, you cannot calculate BMI. Consult a healthcare provider for assessment.
Age must be between 2 and 19 years. Only use this calculator if the person is younger than 20 years. If the Years and Months you entered is correct, use the Adult BMI Calculator.
Months need to be within 0-11 months
Please choose between Years and Months or just Months
Age: Select Age
or enter only the total number of months:
Birth Date: Select Date
Date of Measurement: Select Date
Sex: Select Sex
Height, to nearest 1/8 inch: Select Height
(12 inches = 1 foot; Example: 4 feet, 5 1/2 inches)
Weight, to nearest 1/4 (.25) pound: Select Weight
(8 ounces = 1/2 pounds; Example: 75 3/4 pounds)
Height (decimal places allowed): Select Height
Weight (decimal places allowed): Select Weight
If you accessed the calculator before September 21, 2023, and are experiencing problems, you may need to clear the cached page on your computer. To do that:
- Right-click on the page.
- Click “Inspect”
- Navigate toward the top left of the page and right-click on the refresh button.
- Hit “Empty Cache and Hard Reload”
If you are still having issues, contact CDC-INFO.
Note: This BMI calculator is not a source of clinical guidance. It is not a substitute for professional medical advice. Because BMI is based on weight and height, it is only an indicator of body fatness. Individuals with the same BMI may have different amounts of body fat. Persons may consider seeking advice from their healthcare providers on healthy weight status.
CDC Child and Teen BMI Calculator Widget
Add this widget to your website to let your audience calculate BMI for children and teens. It will also show the corresponding BMI-for-age percentile on a CDC BMI-for-age growth chart. This calculator is for people 2 through 19 years old. BMI is a reliable indicator of body fatness for most people. It is used to screen for weight categories that may lead to health problems.
The Child and Teen BMI Calculator widget is being updated to match the web-based version. The widget can still be used during the update.