Height predictor
Predict adult height with Khamis-Roche and Mid-Parental formulas
This height predictor lets you estimate adult height with two common approaches. Use the Khamis-Roche method when you know the child's current age, height, weight, and sex. Use the Mid-Parental formula when you only need a quick family-height estimate from the parents' heights.
Method 1
Khamis-Roche height predictor
This method estimates adult height from the child's current age, height, weight, sex, and both parents' heights. The result is shown in centimeters and feet plus inches, together with a likely range.
Height input unit
Weight input unit
Child profile
Quick fill
Load the public sample values from the old calculator flow.
Result
Predicted adult height
Estimate for a Girl aged 4 years.
Khamis-Roche prediction
Built from the age-specific coefficient table plus the published margin rules.
164.2 cm
5'4.6"
Likely range: 159.9 cm to 168.5 cm
Imperial range: 5'3" to 5'6.3"
Margin of error: 4.32 cm (1.7 in).
If the predicted value falls below the child's current height, the predictor returns the current height instead.
How to use this height predictor
Use Khamis-Roche when you have the child's current measurements and want a more specific height predictor based on age, sex, height, weight, and parent heights.
Use Mid-Parental when you only need a quick estimate from the parents' heights. It is broader than Khamis-Roche but still useful as a fast height predictor baseline.
Neither result is a diagnosis. Puberty timing, health, and environment can still shift the final adult height.