Child Adult Height Predictor Calculator
Mid-Parental Height Method
Predict adult height from parent heights
Double at Two Method
Estimate adult height from height at age 2
Formula
Mid-Parental Method: Boys = (Father's Height + Mother's Height + 5) / 2 | Girls = (Father's Height + Mother's Height - 5) / 2 | Double at Two: Boys ≈ Height at 2 × 2 | Girls ≈ Height at 2 × 2 × 0.985
Frequently Asked Questions
How accurate is the mid-parental height prediction?
The mid-parental height method predicts adult height within ±2 inches (5 cm) for about 68% of children. It is the most commonly used prediction method in pediatrics. Accuracy decreases for children with unusual growth patterns or medical conditions affecting growth.
Can nutrition affect my child's predicted height?
Yes. Adequate nutrition, especially protein, calcium, vitamin D, and zinc, is essential for reaching genetic height potential. Chronic malnutrition or certain medical conditions can prevent a child from reaching their predicted height. Conversely, excess nutrition does not increase height beyond genetic potential.
At what age do children stop growing?
Girls typically stop growing in height around age 14-16, about 2 years after their first period. Boys typically stop growing around age 16-18. Growth plates close at these ages, ending height increase. Some boys continue gaining small amounts until age 21.
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