Calculate your body mass index in metric or imperial units and see where it falls on the WHO scale, plus the weight range considered healthy for your height.
How it works
- Enter your current weight using kg or lbs.
- Enter your height using cm or inches.
- The calculator returns your BMI score and the matching WHO category.
Frequently asked questions
Is BMI accurate for athletes?
Often not — muscular builds can read "overweight" with low body fat. Treat BMI as a population screen, not a personal verdict.
Does age or sex change BMI?
The formula is the same; interpretation can differ. Children use age-specific percentile charts instead.
What should I do about my result?
Use it as one data point. For health decisions, talk to a medical professional who can consider the full picture.