BMI Percentile Calculator
Calculate BMI percentiles for children and teens using WHO/CDC growth standards
Calculate Child BMI Percentile
Calculator works for children 2-20 years old
Example Calculation
Healthy Weight Example
Child: 11-year-old boy
Height: 137 cm
Weight: 33 kg
BMI: 33 ÷ (1.37)² = 17.6 kg/m²
Result: 61st percentile (Healthy Weight)
Interpretation: Within normal range, continue healthy habits
At-Risk Example
Child: 8-year-old girl
Height: 120 cm
Weight: 35 kg
BMI: 35 ÷ (1.20)² = 24.3 kg/m²
Result: 90th percentile (Overweight)
Interpretation: Above normal range, lifestyle modifications recommended
Child BMI Classifications
Underweight
< 5th percentile
Healthy Weight
5th to 85th percentile
Overweight
85th to 95th percentile
Obese
≥ 95th percentile
Growth Monitoring Tips
Track Trends
Monitor percentile changes over time
Consider Growth Pattern
Sudden changes may need evaluation
Individual Assessment
BMI is one factor among many
Professional Guidance
Consult healthcare providers regularly
Understanding Child BMI Percentiles
Why BMI Percentiles for Children?
Children's BMI changes as they grow and develop. BMI percentiles compare your child's BMI to other children of the same age and sex, providing a more accurate assessment than adult BMI categories.
Key Considerations
- •Growth spurts can temporarily affect BMI percentiles
- •Muscle development in athletic children may increase BMI
- •Puberty timing affects growth patterns
- •Family history and genetics play important roles
When to Seek Medical Advice
Immediate Consultation
BMI < 5th percentile or ≥ 95th percentile
Monitor Closely
Crossing two or more percentile lines
Regular Check-ups
85th-95th percentile (overweight range)
Remember: BMI is a screening tool, not a diagnostic measure. Healthcare providers consider multiple factors including growth velocity, family history, diet, physical activity, and overall health when assessing a child's weight status.