Predict a child's future adult height from both parents' heights, or convert height between feet/inches and centimeters.
This uses the classic "mid-parental height" method: average both parents' heights, then add 5 inches for a boy or subtract 5 inches for a girl (roughly accounting for the average height difference between adult men and women). It's a rough genetic estimate — actual adult height also depends on nutrition, health, and other environmental factors.
Mid-parental height typically predicts a child's eventual height within a few inches, but individual results vary. It works best as a general expectation rather than a precise forecast, especially since it doesn't account for the child's own growth pattern.
It approximates the average height gap between adult men and women, which keeps the prediction centered around realistic values for each sex.
Yes — it's most useful for infants and very young children, before their own growth trajectory becomes a better predictor than parental heights alone.
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