How to use the BMI calculator
- 1Choose metric or imperial units.
- 2Enter your weight and height.
- 3Read your BMI, its category and your healthy weight range.
Frequently asked questions
What is a healthy BMI?
For adults, 18.5 to 24.9. 25 to 29.9 is overweight and 30 or more is obesity (WHO).
Is my data sent anywhere?
No. Everything is calculated in your browser on your own device — nothing you type or upload is sent to a server.