Child Height Prediction Calculator
Predict your child's adult height using the mid-parental height method. Enter both parents' heights and your child's gender to get an estimated adult height range.
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About the Height Prediction Calculator
Our height prediction calculator uses the mid-parental height method, a well-established medical formula used by pediatricians worldwide. This method provides a reasonable estimate of a child's adult height based on genetic factors.
How the Formula Works
The mid-parental height formula calculates the average of both parents' heights, then adjusts based on the child's gender:
- For Boys: (Father's height + Mother's height + 13) / 2
- For Girls: (Father's height + Mother's height - 13) / 2
The predicted height typically falls within a range of plus or minus 4 inches (10 cm) of the calculated value.
Frequently Asked Questions
How accurate is the height prediction?
The mid-parental height method provides an estimate within about 4 inches (10 cm) of actual adult height for most children. It's a well-established medical formula but is not a guarantee.
What is the mid-parental height method?
The mid-parental height method is a medical formula that estimates a child's adult height based on the average of both parents' heights, with adjustments for the child's gender.
Can I use metric or imperial units?
Yes! You can enter heights in either centimeters (cm) or feet and inches. The calculator will display results in both units.
Is this tool free to use?
Yes, completely free with no limits. No account required, no sign-up needed. All processing happens in your browser.
Last updated: June 2026