Growth Percentile Calculator
Weight, height and BMI percentiles in one growth chart. Free, private and instant.
How to use the Growth Percentile
- Pick metric (cm, kg) or imperial (ft, in, lb) units.
- Choose child is a: Boy or Girl.
- Enter age in years and months.
- Enter weight.
- Enter height or length.
- Press Calculate to get an instant result with a colour scale, chart and plain-English explanation.
About the Growth Percentile
See all three key growth measures for a child in one place: weight, height and BMI percentile, with a growth chart and an overall summary.
Also known as: child growth chart calculator, growth percentile chart, WHO growth chart calculator, kids height and weight percentile.
Worked example
- Child is a: Boy
- Age: 5 years
- Weight: 18.5 kg
- Height or length: 110 cm
Weight-for-age percentile: 53rd percentile (BMI-for-age: Healthy weight). At 5 years: weight 53rd, height 50th, BMI 54th percentile. Weight is in the "typical" range.
- Weight percentile: 53rd
- Height percentile: 50th
- BMI: 15.3
- BMI-for-age percentile: 54th
Formula and cut-offs
Weight and BMI use a log-normal z-score, height uses a normal z-score, each against approximate WHO reference medians for age and sex. BMI-for-age is derived from the reference weight and height medians.
Frequently asked questions
How often should I check my child's growth?
Routine checkups plot growth at set ages. Tracking at home every few months is enough. Compare trends, not a single measurement.
Is this a diagnosis?
No. It is an educational estimate. A paediatrician interprets growth with family history, puberty stage and health history.
What do growth chart percentiles mean?
A percentile compares your child with children of the same age and sex. The 75th percentile for height means the child is taller than 75 of 100 children of the same age. Steady growth along a line matters more than any single number.
What is the weight-for-age percentile for a 5-year-old boy, 18.5 kg and 110 cm?
Weight-for-age percentile: 53rd percentile (BMI-for-age: Healthy weight). At 5 years: weight 53rd, height 50th, BMI 54th percentile. Weight is in the "typical" range. Enter your own numbers above for a personal result.
Sources and references
Written and checked by the MediHub editorial team against the sources above. Read how we build and review our calculators.
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Last updated . This calculator is for education only and is not medical advice. See the medical disclaimer.