Body fat calculator
Estimate your body fat percentage from simple tape measurements.
About this calculator
This uses the US Navy method. Measure your neck and waist, plus your hips if you are female, and enter your height. Measure at the navel for the waist and the widest point for the hips, standing relaxed.
It is an estimate and can be a few percent out. Use the same method each time to track change.
Common questions
Where do I measure my waist?
Level with the navel, after breathing out, without pulling the tape tight.
Is it as good as a scan?
No. Scans are more accurate, but this is free and useful for tracking trends.
More free calculators
BMI calculator
Body mass index and a healthy weight range.
Calorie calculator
Daily calories to maintain, lose or gain weight.
BMR calculator
Calories your body burns at rest.
Ideal weight calculator
Target weight from four classic formulas.
Pace calculator
Running pace per mile and per kilometre.
Pregnancy due date calculator
Estimated due date from your last period.