BMI Calculator
FreeWork out body mass index from height and weight, in metric or imperial units, with the standard adult weight categories.
How to use BMI Calculator
- 1Choose metric or imperial units.
- 2Enter height and weight.
- 3Read your BMI and its category.
Private by design. This tool runs in your browser. Nothing you enter or add is uploaded.
Frequently asked questions
Which categories are used?
The World Health Organization adult ranges: under 18.5 underweight, 18.5 to 24.9 healthy weight, 25 to 29.9 overweight, and 30 or above obesity.
Is BMI accurate for everyone?
No. It does not distinguish muscle from fat and is not designed for children, pregnancy or athletes. Treat it as a rough screening figure and ask a health professional for advice.
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