Body mass index (BMI)
Calculate your BMI and the reference weight range for your height.
HEALTH & WELLBEINGBody fat
Estimate fat and fat-free mass from your measurements.
Editable example
Body fat
16.9%
- Fat mass
- 11.9 kg
- Fat-free mass
- 58.1 kg
An estimate, not a diagnosis or personal target. Not applicable during pregnancy. Muscle mass, age and health can change its interpretation. Consult a healthcare professional to interpret the result or change your diet.
More than a result. An explanation.
How is it calculated?
Use a level tape without compressing the skin. Measure neck below the larynx; abdomen at the navel for men, narrowest waist and widest hips for women. Deurenberg uses BMI and age. Individual error can exceed several percentage points.
Navy: 495 / density − 450; Deurenberg: 1.20 × BMI + 0.23 × age − 10.8 × sex − 5.4Is this medical advice?
An estimate, not a diagnosis or personal target. Not applicable during pregnancy. Muscle mass, age and health can change its interpretation.
Are my measurements saved?
Your measurements are not stored or included in links. They are processed only on this device.
Methods reviewed: September 2026