Skip to calculator
baby
Child Height Predictor
Predict your child's adult height using the mid-parental method or Khamis-Roche method. Enter parent heights and optional child measurements for estimated adult height with percentile.
Sex
Units
in
in
Quick Facts
Genetics contribution60-80% of height
Avg US male height5'9" (175.3 cm)
Avg US female height5'4" (161.8 cm)
Growth plates close~14-16 (girls), 16-18 (boys)
Related Tools
baby
Baby Growth Percentile Calculator
Track baby weight, length, and head circumference percentiles (WHO).
Use Baby Growth Percentile Calculator
babyBaby Name Numerology Calculator
Calculate Expression, Soul Urge, and Personality numbers for any name.
Use Baby Name Numerology Calculator
healthBMI Calculator
Calculate BMI with visual gauge and healthy weight range.
Use BMI Calculator
How to Use This Calculator
- Select the prediction method: Mid-Parental (parents only) or Khamis-Roche (includes child data).
- Choose your child's sex and preferred units (metric or imperial).
- Enter both parents' heights.
- For Khamis-Roche, also enter the child's current age, height, and weight.
- Click Predict Height to see the estimated adult height range and percentile.
The Formula
Mid-Parental (boy): (Mother's height + 13cm + Father's height) / 2 ± 8.5cm. Mid-Parental (girl): (Father's height - 13cm + Mother's height) / 2 ± 8.5cm. Khamis-Roche uses regression coefficients based on age, height, weight, and parent heights.Frequently Asked Questions
The mid-parental method gives a rough estimate within about ±8.5 cm (3.3 inches). It's a simple calculation that only considers genetics through parent heights. The Khamis-Roche method is more accurate when child measurements are available.