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Child BMI Calculator

Estimate BMI for a child. Free online calculator with instant results — no login needed.

Height (cm) Weight (kg)

BMI

What is the Child BMI Calculator?

Estimate BMI for a child. Free online calculator with instant results — no login needed.

Enter your values above and the result updates instantly. Children need age-and-sex percentile charts.

BMI = weight ÷ height²

BMI

Same as adults?

No, children are assessed by growth percentiles.