Free Tool
Height Predictor Calculator
Estimate a child's adult height using the mid-parental height method, and see how their current height compares to the average for their age.
Estimated adult height
—
This is the mid-parental height estimate — a widely used starting point, not a guarantee. Genetics sets the range; nutrition, sleep, and health during growing years influence where a child lands within it.
Note for growing children & teens: this method estimates a likely adult height range based on parents' heights alone. It doesn't account for bone age, growth percentile trends, or pubertal timing — a pediatrician can refine this using growth charts and, if needed, a bone-age assessment.
Compared to the average for this age
—
Note for growing children & teens: this compares current height to an approximate general-population average for age and sex — it is a rough reference, not a growth percentile or clinical measurement. A pediatrician plots height on an official CDC or WHO growth chart to track exact percentile and growth velocity over time, which is the reliable way to spot a real concern.
This tool is for general informational purposes only and is not a medical diagnosis. Height prediction involves genetics, nutrition, sleep, and health factors this calculator cannot measure. Consult a healthcare provider for an accurate assessment of a child's growth.
References
- Khamis, H. J., & Roche, A. F. (1994). Predicting adult stature without using skeletal age: The Khamis-Roche method. Pediatrics, 94(4), 504–507. pubmed.ncbi.nlm.nih.gov/7936860
- CDC — Clinical Growth Charts. cdc.gov/growthcharts
- Average height-for-age figures used in the Growth Progress Check are rounded approximations aligned to CDC growth chart medians, for general reference only — not exact clinical percentile data.
FAQs
It typically lands within about 2–4 inches (5–10 cm) of actual adult height. It's a solid starting estimate, not a precise forecast — bone-age testing is more accurate but requires a clinical visit.
Not necessarily. Individual growth varies, and puberty timing shifts final height in either direction. If a child is consistently dropping growth percentiles over time, that pattern — not a single estimate — is what's worth discussing with a pediatrician.
No. This gives a general estimate for personal reference. Official CDC or WHO growth charts, plotted over multiple visits, are the standard tool for tracking a child's actual growth percentile and velocity.
