A child height predictor estimates how tall your child will be as an adult based on the parents' heights. This free calculator uses the mid-parental height method - the most widely used clinical formula endorsed by pediatricians - to give you an instant predicted adult height range.
The mid-parental height method predicts adult height within a range of about +/- 2 inches (5 cm) for most children. It accounts for roughly 40-60% of height variation, with nutrition, health, and other genetic factors making up the rest.
Your child's predicted adult height depends primarily on the biological parents' heights. Boys tend to be about 2.5 inches taller than the mid-parental average, and girls about 2.5 inches shorter. Use our calculator above for an instant estimate.
Most girls reach their full adult height by age 14-16, while most boys continue growing until age 16-18. Some boys may grow slightly until age 20. Growth plates in the bones fuse at the end of puberty, which stops height increase.
Yes, adequate nutrition is essential for reaching genetic height potential. Protein, calcium, vitamin D, and zinc are particularly important for growth. Chronic malnutrition during childhood can result in shorter adult height than genetically predicted.
Yes, pediatricians commonly use the mid-parental height formula (also called the Tanner method) as a quick estimate of a child's genetic height potential. It is one of several tools used alongside growth charts to assess whether a child is growing as expected.
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