FAQ

Short answers about the predictor

What does this calculator do?

It estimates a child’s adult height from the father’s height, the mother’s height, and whether the child is a boy or a girl.

What’s the difference between Tanner and Adjusted?

Tanner is the corrected mid-parental height method many Western pediatric clinics use. The adjusted method (Luo et al., 1998) pulls the prediction toward the population average, so the gap is more noticeable when both parents are quite tall or quite short.

Why isn’t there a race or ethnicity option?

This first version sticks to parents’ heights and sex only. We don’t claim race-specific accuracy.

Why no current height or weight?

Methods like Khamis–Roche need the child’s current height, weight, and age. We didn’t include those yet — maybe later.

What does the range mean?

Tanner uses about ±8.5 cm. The adjusted method shows about ±10 cm as a rough 95% interval. Most kids land somewhere in that band — not always on the midpoint.

Is this medical advice?

No. It’s an educational estimate. Nutrition, health, and puberty timing aren’t in this math.