Midparental Height Calculator
Predicted adult height from parents' heights.
Enter your values
ⓘ Live results
Results
- Predicted adult height
- 5 ft 9.5 in
- In inches
- 69.5 in
- In centimetres
- 176.5 cm
- Likely range (±4 in)
- 5 ft 5.5 in to 6 ft 1.5 in
- Midparental average
- 67 in
Quick answer
Midparental height adds 5 inches to the mother's height for boys (or subtracts 5 from the father's for girls), averages the parents, and allows ±4 inches.
boys: (mother + 5in + father) ÷ 2
How to use the Midparental Height Calculator
- 1Enter the father's height in inches.
- 2Enter the mother's height in inches.
- 3Select the child's sex.
Worked example
Using the values the calculator loads with:
Inputs
- Father's height70 in
- Mother's height64 in
- Child's sexBoy
Results
- Predicted adult height5 ft 9.5 in
- In inches69.5 in
- In centimetres176.5 cm
- Likely range (±4 in)5 ft 5.5 in to 6 ft 1.5 in
- Midparental average67 in
Frequently asked questions
How accurate is midparental height?
Roughly ±4 inches for 95% of children — nutrition, health and growth timing all shift the final result.
Can a child outgrow the prediction?
Yes. The formula is a genetic average; children regularly land outside the range, especially with early or late puberty.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.