Khamis Roche Method 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
164.0 cm
Adult Height Predictor
Predicted adult height
64.6 in
Predicted adult height
5 ft 4.6 in
Low end of the likely range
158.4 cm
High end of the likely range
169.6 cm
Mid-parental (target) height
178.5 cm
Share of predicted adult height reached
79.3 %
Growth still to come
34.0 cm
Method
Khamis-Roche regression (cm-kg coefficients)
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

4 steps
  1. Mid-parent stature = (180 + 164) / 2 = 172 cm.
  2. Adult stature = b0 + b1 x stature + b2 x weight + b3 x mid-parent stature = 10 + 0.5 x 130 + 0.1 x 30 + 0.5 x 172 = 164 cm.
  3. Reported standard error of estimate: +/- 5.6 cm.
  4. For comparison, the Tanner mid-parental target height is 178.5 cm.

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