The most accurate non-radiological pediatric growth prediction available — peer-reviewed in the Fels Longitudinal Study since 1994.
Enter your measurements on the left and tap calculate to see your genetic height prediction.
The Khamis-Roche method, published in the Fels Longitudinal Study and corrected in the 1995 erratum, achieves a median margin of error of ±2.1 inches (5.3 cm) for males and ±1.7 inches for females. It is the most accurate non-radiological height prediction method available, requiring no bone-age X-ray.
The calculator applies the Khamis-Roche polynomial to generate your genetic baseline prediction. This represents approximately 70–85% of your height potential; the remaining 15–30% is influenced by nutrition, spinal alignment, and sleep quality.
Males typically complete primary skeletal growth between ages 17–21, when the epiphyseal plates fuse. Females generally complete growth between 15–18. Peak height velocity occurs around ages 11–13 for females and 13–15 for males.
Yes. Active spinal decompression and posture correction can reverse daily gravitational compression, routinely increasing visual standing height by 0.25 to 2.0 inches by optimizing intervertebral disc hydration and correcting abnormal sagittal curvature.
The algorithm incorporates mid-parental stature as a critical regression variable because parental height is the strongest single predictor of a child's genetic height potential. Both heights are averaged to derive the genetic baseline coefficient.
