BMI Calculator

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Calculate your Body Mass Index and see which weight category you fall into.

How the calculation works

BMI divides your weight in kilograms by your height in metres squared. Adults are generally grouped as underweight (below 18.5), normal (18.5 to 24.9), overweight (25 to 29.9) and obese (30 and above). BMI is a screening tool and does not measure body fat directly.

Formula used

BMI = weight (kg) ÷ height (m)²; for pounds and inches: BMI = 703 × weight (lb) ÷ height (in)²

Example

A person who is 70 kg and 170 cm tall has a BMI of 24.2, which is in the normal range.

Frequently asked questions

Is BMI accurate for athletes?

Not always. Muscular people can have a high BMI without excess body fat.

What is a healthy BMI?

For most adults, 18.5 to 24.9, but talk to a doctor about your own situation.

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Results are estimates for general information only and are not professional financial, medical or legal advice.