Child Height Predictor
Predict a child's adult height range from the parents' heights.
Predicted adult height (mid-parental)
0cm
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This is only a statistical estimate of genetic target height and varies with nutrition, sleep and growth pace. For growth concerns see a pediatrician; for height versus peers use the KDCA (Korea Disease Control and Prevention Agency) growth charts.
What is mid-parental height?
Mid-parental height is the most widely used way to gauge the adult height a child may reach genetically from the parents' heights. It adjusts for the average height gap between men and women (about 13 cm), so sons and daughters use different formulas. The result is not a guess at one child's height but the statistical centre for children of the same parents.
How to use
Choose the child's sex and enter the father's and mother's heights (cm); the predicted adult height and range update instantly. Use measured heights rather than remembered ones for a better result.
To see where your child stands among peers now, use the KDCA growth charts; this calculator contains no growth-chart data. For body size see the BMI calculator, and for daily energy needs the BMR calculator.
Formulas and sources
This is the mid-parental height method set out by Tanner et al. (Arch Dis Child, 1970). All heights are in cm.
| Child | Predicted adult height |
|---|---|
| Son | (father + mother + 13) ÷ 2 |
| Daughter | (father + mother − 13) ÷ 2 |
The prediction range is ±8.5 cm around the estimate, a width commonly cited as roughly a 95% range. For example, with a 175 cm father and 162 cm mother, a son is (175 + 162 + 13) ÷ 2 = 175.0 cm (166.5–183.5 cm) and a daughter is (175 + 162 − 13) ÷ 2 = 162.0 cm (153.5–170.5 cm).