Height Calculator
Predict a child's adult height based on parents' heights and convert between metric and imperial units.
Adult Height Prediction
This uses a linear regression method based on parents' heights. Results are estimates and may vary.
Predicted height: cm
In feet and inches:
Note: This is an estimate based on average genetic factors.
Height Converter
Convert between centimeters and feet/inches.
Converted height:
Equivalent:
How the height prediction formula works
This uses the "mid-parental height" method: average the two parents' heights, then adjust by adding about 6.5 cm for boys or subtracting about 6.5 cm for girls (reflecting typical average height differences between adult men and women) — giving a rough predicted adult height. It's a population-level statistical estimate, not a genetic calculation specific to any individual child.
Frequently asked questions
How accurate is this prediction? It's a rough estimate with a fairly wide margin of error (commonly cited as within several centimeters either way) — actual adult height depends on many additional genetic and environmental factors like nutrition and health during childhood that this simple formula can't capture.
Is there a more accurate method? Pediatricians sometimes use bone-age X-rays and growth charts tracked over years for a more clinically grounded prediction — this calculator is meant for general curiosity, not medical or clinical use.
Why does the boy/girl adjustment matter? On average, adult men are taller than adult women by a consistent margin across most populations — the ±6.5 cm adjustment accounts for that typical sex-based difference when predicting from the same set of parental heights.