Pink Mom MathBaby Height Predictor
Enter parent heights and child sex to estimate your baby's adult height using the Tanner mid-parental method.
How the Tanner Height Predictor Works
The Tanner mid-parental height method uses a simple formula based on parent heights and the child's sex:
- Boys: (Mother's height + Father's height + 13 cm) / 2
- Girls: (Mother's height + Father's height − 13 cm) / 2
The 13 cm adjustment accounts for the average sex-based height difference between men and women. The formula then divides by 2 to find the mid-point.
The standard deviation for this method is ±8.5 cm, meaning the actual adult height will typically fall within 8.5 cm above or below the prediction.
Frequently Asked Questions
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This calculator provides estimates for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your healthcare provider with questions about your health or your baby's health.
Tanner mid-parental height method (Tanner JM, 1970). This is a statistical estimate — actual adult height depends on genetics, nutrition, health, and other factors.