Height Calculator

Predict a child’s adult height from age, weight, and parents’ heights (Khamis–Roche), or use parents-only mid-parental height. Includes a height unit converter.

Calculator

Units

Child’s gender

Child’s age (years)

years

Best ages 4–17.5

Child’s height (cm)

Child’s weight (kg)

Mother’s height (cm)

Father’s height (cm)

Child’s height (ft)

Child’s height (in)

Child’s weight (lb)

Mother’s height (ft)

Mother’s height (in)

Father’s height (ft)

Father’s height (in)

Height (cm)

Height (ft)

Height (in)

Frequently asked questions

What does the Height Calculator do?

Predict a child’s adult height from age, weight, and parents’ heights (Khamis–Roche), or use parents-only mid-parental height. Includes a height unit converter. Enter your values and get an instant estimate in your browser — free, with no signup.

Is the Height Calculator free to use?

Yes. OpenCalcy calculators are free to use, work on mobile, and keep favorites privately in your browser.

How is the Height Calculator calculated?

It uses this formula: KR: adult(in) = B0 + b1·H + b2·W + b3·midparent; Tanner: boy (F+M+13)/2 cm, girl (F+M−13)/2 cm Khamis–Roche was developed for healthy white American children ages 4–17.5. Estimate only (±~5 cm) — not a medical diagnosis.

Height Calculator

Frequently asked questions

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