BMI Calculator for Kids
Result
BMI Calculator for Kids Find a child's BMI and see where it sits on the CDC growth charts. Enter your child's sex, age, weight, and height, and this calculator returns their BMI plus the underweight, healthy, overweight, and obese ranges for their age and — free online calculator.
Formula
- BMI Calculator for Kids calculates its result from Weight (kg), Height (cm), L reference value, M reference value (BMI median), S reference value. It uses the formula BMI = weight (kg) / height (m)². Change any input to recalculate the result instantly. This is an informational calculation and is not medical advice.
- The main inputs are Weight, Height, L reference value, M reference value, S reference value. Enter them in the units and format shown in the calculator.
- Use the measurement units shown beside each field. The result is an estimate and should be interpreted in context.
- Changing any input above recalculates the result with the same calculation engine used by this page.
Example: BMI Calculator for Kids
- Weight: 35 kg
- Height: 140 cm
- L reference value: 1
- M reference value: 18 BMI median
- S reference value: 0.12
Using Weight (kg) = 35, Height (cm) = 140, L reference value = 1, M reference value (BMI median) = 18, S reference value = 0.12, the calculated result is BMI: 17.8571428571 | LMS z-score: -0.0661375661 | Percentile %: 47.3634081803.
Sample result: Calculating…
Frequently asked questions
What does the BMI Calculator for Kids calculate?
BMI Calculator for Kids Find a child's BMI and see where it sits on the CDC growth charts. Enter your child's sex, age, weight, and height, and this calculator returns their BMI plus the underweight, healthy, overweight, and obese ranges for their age and — free online calculator.
Which values should I enter?
Enter Weight, Height, L reference value, M reference value, S reference value using the units and format shown beside each field.
What formula does this calculator use?
The calculator uses the following relationship: BMI = weight (kg) / height (m)².
Why might my result differ from another source?
Results can differ because measurement methods, rounding and assumptions vary. This calculator is an estimate and is not a medical diagnosis.
Does the result update automatically?
Yes. Changing an input updates the result using the same calculation engine shown on this page.