Calculators
Height Calculator
Predict a child's adult height.
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Result
Predicted adult height
5′ 10″
177 cm (±4 in)
About the Height Calculator
Curious how tall a child will be? Enter the mother's and father's heights and the child's sex and the calculator predicts adult height using the mid-parental (Tanner) method. It's an estimate with a natural ±4-inch range — genetics, nutrition, and health all play a part.
How to use the Height Calculator
- 1Enter your child's sex and both parents' heights.
- 2Read the result instantly — it recalculates as you type.
- 3Adjust the numbers to model different scenarios.
Frequently asked questions
How accurate is a height prediction?
The mid-parental method typically lands within about 4 inches of actual adult height, but individual outcomes vary.
What is the formula?
Average the parents' heights, then add 2.5 inches for a boy or subtract 2.5 inches for a girl.