Child Growth Calculator
Check a child's BMI-for-age and estimate their adult height from the parents' heights.
Inputs
Formula
- BMI = weight / height²
- Mid-parental height = (mother + father ± 13) / 2
Children's BMI must be read against age, not adult cut-offs. The mid-parental method predicts adult height within about 8 cm for most children. Consistent tracking on your paediatrician's growth chart beats any single measurement.
Step-by-step calculation
- 1
BMI
kg / m²
15.9
- 2
Mid-parental
(mother + father ± 13)/2
174 cm
Warnings
- A screening aid only — always confirm with WHO/IAP growth charts and your paediatrician.
Frequently asked questions
What does the Child Growth Calculator do?
Check a child's BMI-for-age and estimate their adult height from the parents' heights. The Child Growth Calculator on OneCalcApp returns the result instantly as you type, together with the formula and the substituted values.
How do I use the Child Growth Calculator?
Enter your values in the input fields, choose the relevant units or options, and the Child Growth Calculator recalculates automatically. You can copy, print or export the result.
Is the Child Growth Calculator free to use?
Yes. The Child Growth Calculator is completely free, needs no sign-up and has no usage limit on OneCalcApp.
How accurate is the Child Growth Calculator?
It uses the standard formula BMI = weight / height² and full double-precision arithmetic, so results match a manual calculation to the displayed number of digits.
Does the Child Growth Calculator work on mobile and offline?
Yes. The Child Growth Calculator runs entirely in your browser on phones, tablets and desktops, and your inputs never leave your device.
Where can I find related tools?
OneCalcApp hosts 300+ calculators and converters, including the full Health collection. Related tools are linked at the bottom of every page.
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