BMI Calculator
Classic WHO BMI check from weight and height, with the healthy-weight range for your height.
About the BMI Calculator
BMI Calculator returns your Body Mass Index using the standard WHO formula, BMI = weight (kg) ÷ height (m)². The tool also reports the healthy weight range for your height so you have a concrete target, not just a number.
How to use
- Enter your weight in kilograms and height in centimetres.
- Click Calculate to see BMI, category and healthy range.
- Compare with the specialised BMI tools for context-specific interpretation.
Benefits & key features
- Quick screening tool for overall body composition.
- Uses the internationally-recognised WHO category cut-offs.
- Works for adults 18-65; children and seniors have their own charts.
- Pairs beautifully with TDEE and Body Fat calculators.
Pro tip
BMI doesn't distinguish muscle from fat — athletes may register 'overweight' while being very lean. Cross-check with the Body Fat (Navy) Calculator.