Child's adult height predictor
An estimate of your child's adult height based on both parents' heights.
How it works
Mid-parental target height (Tanner method): boy = (father + mother + 13) ÷ 2, girl = (father + mother − 13) ÷ 2. About 95% of children end up within ± 8.5 cm of this value. An estimate only.
Results are for guidance only and do not replace professional advice.
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Worked example
With the default values:
- Father's height (cm)180
- Mother's height (cm)166
- ChildBoy
you get:
- Estimated adult height180 cm
- Likely range (95%)171 – 188 cm
- In feet and inches5′ 11″
Frequently asked questions
How does the “Child's adult height predictor” tool work?
Mid-parental target height (Tanner method): boy = (father + mother + 13) ÷ 2, girl = (father + mother − 13) ÷ 2. About 95% of children end up within ± 8.5 cm of this value. An estimate only.
What do I need to enter?
Just fill in: father's height, mother's height, child. The result updates as you type.
Can you give an example?
Father's height (cm): 180; Mother's height (cm): 166; Child: Boy → Estimated adult height: 180 cm; Likely range (95%): 171 – 188 cm.
Is this calculator free, and is my data private?
Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.