BMI calculator
Body mass index from height and weight, in metric or imperial, with the healthy weight range.
cm
kg
Your BMI
Healthy weight
- Healthy weight for your height
- 56.7 kg – 76.3 kg
How it's worked out
BMI = weight in kg ÷ (height in m)²: 70 ÷ 1.75² = 22.9
Under 18.5 is underweight, 18.5 to 24.9 healthy, 25 to 29.9 overweight and 30 or more obese. BMI is a rough guide for adults: it doesn't tell muscle from fat, and it isn't meant for children or pregnancy.
- 1Type your height and weight.
- 2See your BMI and what it means.
- 3See the healthy weight range for your height.
- Are my numbers private?
- Yes. Every calculation runs in your browser, and what you type stays on your device.
- Does it work offline?
- Yes. Once this page has loaded, it keeps working without an internet connection.
- How exact are the results?
- The maths keeps full precision and only rounds what you see. For loans and taxes, check the final figures with your bank or tax office.
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