Height Calculator
Predict your child's adult height using the Mid-Parental Height formula based on both parents' heights.
Mid-Parental Height Examples
The calculator averages both parents' heights, then adds 6.5 cm for a boy or subtracts 6.5 cm for a girl.
| Parents | For a boy | For a girl | Typical range |
|---|---|---|---|
| 160 cm and 160 cm | 166.5 cm | 153.5 cm | Estimate plus or minus 10 cm |
| 160 cm and 170 cm | 171.5 cm | 158.5 cm | Estimate plus or minus 10 cm |
| 165 cm and 180 cm | 179 cm | 166 cm | Estimate plus or minus 10 cm |
| 170 cm and 190 cm | 186.5 cm | 173.5 cm | Estimate plus or minus 10 cm |
| 180 cm and 180 cm | 186.5 cm | 173.5 cm | Estimate plus or minus 10 cm |
Frequently Asked Questions about the Height Calculator
How does this height calculator work?
It uses the Mid-Parental Height formula. Add 13 cm to the parents' combined height for a boy, or subtract 13 cm for a girl, then divide by 2. This is equivalent to averaging both parents first and then adding or subtracting 6.5 cm. The result is a population estimate, not a guaranteed adult height.
How accurate is the prediction?
The MPH formula is a population-level estimate, not a guarantee. Actual adult height typically falls within +/- 10 cm (roughly +/- 4 in) of the predicted value. Nutrition, sleep, chronic illness, and genetic factors beyond the parents can all shift the final outcome in either direction.
Why are boys and girls calculated differently?
On average, adult men are about 13 cm (5 in) taller than adult women. The formula applies a +13 cm adjustment for boys and a -13 cm adjustment for girls to account for that population-level sex difference in height.
Can I use this for adults or teenagers?
No. The MPH formula estimates how tall a child will be once growth is complete. If the person has already finished growing, their current measured height is the answer and no formula is needed.
Should I see a pediatrician about my child's growth?
Yes, if you have any concerns. This calculator gives a rough genetic estimate and is not a substitute for medical evaluation. A pediatrician can track your child's growth on standardized charts over time and identify any issues that warrant follow-up.
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