0 predicted adult height
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In centimetres
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Likely range (± 4 inches)
Uses the mid-parental (Tanner) method: average the parents’ heights, add 2.5 inches for a boy or subtract 2.5 inches for a girl. It is an estimate — actual adult height also depends on nutrition, health and genetics.
Frequently Asked Questions
How is a child’s adult height predicted?
The mid-parental method averages the mother’s and father’s heights, then adds about 2.5 inches (6.5 cm) for a boy or subtracts 2.5 inches for a girl. Most children end up within about 4 inches of this estimate.
Predict a child’s adult height from the parents’ heights using the mid-parental method.