What is the Height Percentile Calculator?
The height percentile calculator is a free online tool that helps you work out height percentile quickly and accurately. It uses the standard formula Mid-parental height: boys = (father + mother + 13)/2; girls = (father + mother - 13)/2 and shows the result instantly as you type, along with a full breakdown so you can see exactly how the answer was reached.
How to use this calculator
- Enter both parents' heights.
- Choose the child's gender.
- See the predicted adult height.
Formula used
Mid-parental height: boys = (father + mother + 13)/2; girls = (father + mother - 13)/2Explanation of each input
- Father's height (cm) โ the father's height used in the calculation.
- Mother's height (cm) โ the mother's height used in the calculation.
- Child's gender โ the child's gender used in the calculation.
Understanding your result
- Predicted adult height โ the calculated predicted adult height in cm.
Step-by-step calculation
For the example values Father 175, mother 162, boy:
- Apply the formula:
Mid-parental height: boys = (father + mother + 13)/2; girls = (father + mother - 13)/2 - Substitute the values: (175+162+13)/2
- Result: about 175 cm (+/- 8.5 cm)
Worked example
| Inputs | Father 175, mother 162, boy |
|---|---|
| Working | (175+162+13)/2 |
| Result | about 175 cm (+/- 8.5 cm) |
Benefits and practical uses
This calculator saves you time and reduces errors when you need height percentile. It is useful for students, professionals and anyone who wants a fast, reliable answer without manual calculation. Results update instantly, work in your browser and can be copied or shared in one click.
Assumptions and limitations
- Mid-parental height method.
Frequently asked questions
How accurate is this?
Mid-parental height predicts within about +/- 8.5 cm; nutrition and health also matter.