Free Pediatric BMI Calculator
Calculate BMI for children and teens and compare to age-based percentile ranges for weight status assessment.
lbs
inches
years
BMI
16.9
BMI Prime (vs 85th percentile)0.89
BMI vs Weight
Pediatric BMI
For children aged 2-19, BMI is calculated the same as adults but interpreted differently using age- and sex-specific percentile charts.
BMI = (Weight in lbs x 703) / (Height in inches)^2
Weight Status Categories
Note: This calculator computes BMI. For exact percentile, use CDC growth charts with the child's age and sex.
Example Calculation
A 10-year-old weighing 70 lbs, 54 inches tall.
- 01BMI = (70 x 703) / (54 x 54)
- 02= 49,210 / 2,916
- 03= 16.9
Frequently Asked Questions
Learn More
Understanding BMI: What It Means and How to Calculate It
Learn what BMI is, how to calculate it, what the ranges mean, and the limitations of body mass index as a health metric. Comprehensive guide with formulas and context.