Health & Fitness

Free Child & Teen BMI Percentile Calculator (CDC & WHO)

Unlike adult BMI which uses static thresholds, pediatric Body Mass Index for children and teenagers (ages 2 to 19) must be evaluated relative to age- and gender-specific growth charts. CDC growth charts rank a child's BMI as a percentile compared to thousands of peers. Our free bmi percentile calculator allows parents and pediatricians to use a child bmi calculator cdc, evaluate pediatric bmi percentile calculator benchmarks, and check who child growth percentile finder ranges.

Child & Teen BMI Percentile Calculator (CDC & WHO)

Calculate BMI percentile for children and teens aged 2 to 19 according to CDC growth charts.

Child's Gender

Age (Years 2-19)

Height (inches)

Weight (lbs)

CDC BMI Percentile

20th %ile

Healthy Weight (5th to 85th percentile)

Raw BMI Score:16.9 kg/m²

Comparison:Taller/heavier than 20% of boys age 10.

CDC Pediatric BMI Percentile Categories

Underweight

< 5th percentile

Healthy Weight

5th to 85th percentile

Overweight

85th to 95th percentile

Obesity

≥ 95th percentile

Mathematical Formulas & Calculation Methods

Pediatric BMI & Z-Score Formula

BMI is calculated first, then mapped against age and gender growth percentiles.

BMI = Weight (kg) / [Height (m)]² | Percentile = Standardized CDC Growth Z-Score

Worked Step-by-Step Examples

Example 1: 10-Year-Old Boy, Height 54 inches (137 cm), Weight 70 lbs (31.7 kg)

"Calculate BMI and CDC Percentile."

Steps:

BMI = (70 / 54²) × 703 = 16.9 kg/m².
Compare to CDC 10-year-old boy median (16.4 kg/m²).
Calculated Percentile = ~62nd Percentile.

Result: BMI = 16.9 (62nd Percentile — Healthy Weight).

What is Child & Teen BMI Percentile Calculator (CDC & WHO)?

A bmi percentile calculator assesses pediatric body composition relative to official CDC growth benchmarks.

The 5th to 85th percentile range is classified by the CDC as a healthy weight for children and teens.

How to Use Child & Teen BMI Percentile Calculator (CDC & WHO)

1Select Imperial (inches/lbs) or Metric (cm/kg) units.
2Select child's gender (Boy or Girl) and Age (2 to 19 years).
3Enter height and weight.
4Review instant CDC BMI Percentile, raw BMI score, and health classification.

Key Features

Supports boys and girls aged 2 to 19 years.
Provides CDC growth percentile rankings and weight category color coding.
Supports both imperial and metric unit systems.

Benefits of Using Child & Teen BMI Percentile Calculator (CDC & WHO)

Helps parents monitor healthy child growth trends over time.

Assists pediatric nurses and teachers in school health screenings.

Practical Use Cases

Parents & Guardians

Track child growth trends against CDC percentile charts.

Pediatricians & School Nurses

Perform quick health screening BMI calculations.

Frequently Asked Questions

Why isn't adult BMI used for children?

Children's body composition changes rapidly as they grow, and body fat ratios vary significantly between boys and girls at different ages, requiring age- and gender-adjusted percentiles.

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