Calculating your predicted adult height is straightforward once you know the Child Height Predictor formula and what each input means. This guide explains the method in plain language, walks through a manual calculation, and gives worked examples you can follow — then you can do it instantly with the Child Height Predictor Calculator.
What is Child Height Predictor?
The Child Height Predictor calculation tells you your predicted adult height from a few simple inputs. The figure you are solving for here is the predicted adult height.
The Child Height Predictor formula
The core formula is:
Predicted adult height = (Mother's height + Father's height) ÷ 2 + Child's sexHere is what each input means:
- Mother's height — a value measured in cm. Example: 160 cm.
- Father's height — a value measured in cm. Example: 175 cm.
- Child's sex — one of: Boy, Girl. Example: Boy.
How to calculate it step by step
- Write down the mother's height (for example, 160 cm).
- Write down the father's height (for example, 175 cm).
- Choose the child's sex (for example, Boy).
- Apply the formula above to get your predicted adult height.
- Double-check the result with the Child Height Predictor Calculator.
Worked examples
Example 1
| Input / Output | Value |
|---|---|
| Mother's height | 160 cm |
| Father's height | 175 cm |
| Child's sex | Boy |
| Predicted adult height | 174.0 |
With mother's height of 160 cm, father's height of 175 cm and child's sex of Boy, the predicted adult height works out to 174.0.
Example 2
With mother's height of 320 cm, father's height of 175 cm and child's sex of Boy, the predicted adult height works out to 254.0.
| Result | Value |
|---|---|
| Predicted adult height | 254.0 |
Example 3
With mother's height of 80 cm, father's height of 175 cm and child's sex of Boy, the predicted adult height works out to 134.0.
| Result | Value |
|---|---|
| Predicted adult height | 134.0 |
Tips for an accurate result
- Keep your units consistent — mixing, say, months with years or grams with kilograms is the most common source of error.
- Round only at the very end. Rounding inputs early can shift the final answer noticeably.
- Re-run the numbers whenever an input changes, rather than estimating from an old result.
- These figures are general estimates, not medical advice — check with a qualified professional before acting on them.
Prefer not to do the maths by hand? — the Child Height Predictor Calculator does it instantly, for free, with the formula and a worked example built in.
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