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Enter your child’s sex, chronological age (from about 2 to 17 years), and current standing height in centimeters. We apply a smoothed fraction-of-mature-height curve to estimate a rough adult height band (±8 cm teaching window). Optionally add both parents’ heights to compare with a mid-parental target (Tanner-Davies). This is not a substitute for growth charts, bone age, or your pediatrician.
Last updated: April 20, 2026
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Model starts at about 2 years; use corrected age for preemies if advised.
Current value: 4 ft 2 in
Projected adult height (from current height ÷ mature fraction)
159.3–175.3 cm
Midpoint ≈ 167.3 cm (5 ft 6 in)
Assumed fraction of adult height at this age/sex: 0.765
Mid-parental target (Tanner-Davies)
≈ 180 cm (5 ft 11 in)
Compare to the projection above; both are estimates with overlapping error.
We divide current height by an interpolated fraction that increases toward 1.0 by late adolescence, separately for male and female average curves.
When both parents’ heights are provided, we show a Tanner-Davies-style mid-parental target in cm and feet/inches for side-by-side learning.
Final height depends on puberty timing, nutrition, sleep, chronic illness, and genetics beyond parents’ heights—precision to the millimeter would be misleading.
If the current-height projection and mid-parental target are within the same few centimeters after rounding, many families feel reassured—but growth velocity on the official chart still matters more than any single snapshot.
Pediatric orthopedics and general pediatrics textbooks sometimes summarize average “percentage of adult height” achieved at integer ages. We encoded separate knot tables for male and female averages and linearly interpolate between them. Predicted adult height ≈ current cm ÷ fraction, then we add a symmetric ±8 cm band to discourage false precision.
Compare with our mid-parental height calculator when you only know parental heights.
Get a Custom Calculator for Your PlatformThe form’s default shows a projected adult height band around the midpoint 167.3 cm (5 ft 6 in) with ±8 cm margins, plus a mid-parental target near 180 cm when both parents are entered—useful for classroom discussion, not for replacing plotted growth percentiles.
Share it for growth-and-development coursework
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