Height Calculator

Measured, not reported, wherever possible. Centimetres, or inches in US units.
Centimetres, or inches in US units.
Required by the doubling rule and by Khamis-Roche; optional for mid-parental.
Required by Khamis-Roche only.
Used to check that the chosen method is being applied inside its published age range.
From the published Khamis-Roche coefficient table for this sex and half-year age.
Predicted adult height
179.0 cm
Adult Height Predictor
Predicted adult height
70.5 in
Predicted adult height
5 ft 10.5 in
Low end of the likely range
170.5 cm
High end of the likely range
187.5 cm
Mid-parental (target) height
179.0 cm
Method
Tanner mid-parental (target) height
Worked out from Tanner JM, Goldstein H, Whitehouse RH. Standards for children's height at ages 2-9 years allowing for height of parents. Arch Dis Child 1970;45:755-762 and 3 other sources.
A predicted adult height is a statistical estimate with a wide error band, not a measurement. Tanner's target range spans about 17 cm, and the Khamis-Roche standard error is roughly 5.6 cm for boys and 4.3 cm for girls. Short stature, a falling height percentile or delayed puberty should be assessed by a clinician, not by a calculator.

How this is worked out

2 steps
  1. Mid-parental height (boy) = (father + mother + 13 cm) / 2 = (180 + 165 + 13) / 2 = 179 cm.
  2. Target range = 179 +/- 8.5 cm = 170.5 to 187.5 cm.

Results are general information, not financial, tax, legal, medical or engineering advice.