Height Predictor Calculator
Predict your child's adult height using the mid-parental height method based on parents' heights.
How to use this calculator
👉 Fill in the boxes below and your answer appears instantly — no maths needed, we do it all for you! 🎉
In plain English — what does this do?
📊 A helper for daily life! Things like working out your age, how much to tip, what a sale price is, or how long until your birthday. Quick and easy answers for real life!
The Height Predictor uses the mid-parental height method, a clinically accepted technique that estimates a child's adult height based on the biological parents' heights. It accounts for genetic contribution from both parents and provides a predicted height along with a normal range of ±8.5 cm (±3.3 inches).
Predicted Adult Height
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Low Range
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High Range
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What is Height Predictor Calculator?
The Height Predictor uses the mid-parental height method, a clinically accepted technique that estimates a child's adult height based on the biological parents' heights. It accounts for genetic contribution from both parents and provides a predicted height along with a normal range of ±8.5 cm (±3.3 inches).
How to use it
- 1️⃣ Enter the father's height using either centimeters or feet and inches.
- 2️⃣ Enter the mother's height in the same unit system.
- 3️⃣ Select the child's sex (male or female).
- 4️⃣ Optionally enter the child's current age and height to see their current growth percentile.
- 5️⃣ Click Calculate to see the predicted adult height and the expected range.
Formula
💡 See it in action — a real example
❓ Common questions
- How accurate is the mid-parental height method?
- It predicts adult height within ±8.5 cm (±3.3 in) for about 95% of children. Nutrition, health, and other environmental factors can influence actual height.
- At what age does height prediction become more accurate?
- Predictions become more accurate as children approach puberty. Bone age X-rays can further refine the estimate.
- Does genetics fully determine height?
- Genetics accounts for roughly 60–80% of height variation. Nutrition, sleep, exercise, and overall health make up the rest.
- What is the 13 cm adjustment for?
- The 13 cm (5.1 in) adjustment accounts for the average height difference between adult men and women, centering each sex's predicted height on the correct distribution.
- Can I use this for adopted children?
- The formula requires biological parents' heights. For adopted children without that information, growth charts and pediatrician assessments are more appropriate tools.