Child Height Predictor Calculator
Unit system
Formula
Child gender
Father's height Centimeter(cm)
Mother's height Centimeter(cm)
Child's current height (optional) Centimeter(cm)
Average parental height: -
WHO boy prediction: -
WHO boy range (±8.5 cm): -
WHO girl prediction: -
WHO girl range (±8.5 cm): -
MPH boy prediction: -
MPH boy range (±7.5 cm): -
MPH girl prediction: -
MPH girl range (±7.5 cm): -
Child Height Predictor
Estimate adult height from biological parents using two common mid-parental formulas. Supports metric (cm) and imperial (ft+in), and can show boy/girl results together. For family reference only—not a medical diagnosis.
Formulas
1. WHO / mid-parental height (cm)
- Boy: (father + mother + 13) ÷ 2
- Girl: (father + mother − 13) ÷ 2
- Typical range: about ±8.5 cm
2. Midparental Height (MPH) (cm)
- Boy: (father + mother) × 1.08 ÷ 2
- Girl: (father × 0.923 + mother) ÷ 2
- Typical range: about ±7.5 cm
Example: father 178 cm, mother 165 cm → WHO boy ≈ 178 cm (169.5–186.5), girl ≈ 165 cm (156.5–173.5).
What affects height?
Genetics explain roughly 60–80% of adult height differences; nutrition, sleep, hormones, and health explain about 20–40%.
Notes
- Use biological parents only—not step or adoptive parents.
- This is an adult-target estimate, not a current growth-percentile reading.
- More precise options: Khamis-Roche, bone-age X-ray, and CDC/WHO growth charts.
Disclaimer: If you are concerned about short or tall stature, consult a pediatrician.