Body fat calculator
Your body fat percentage from a tape measure, by the US Navy's method, with what it is in kilograms or pounds. Free, with no account or uploads.
Your body fat from a tape measure
Measure your waist, neck and, for women, hips; type them with your height. It is an estimate.
The formulas were measured separately for women and men.
At its narrowest.
Just below the Adam's apple.
At their widest.
Body fat, US Navy method
About 30.7%
About 20.0 kg of 65.0 kg. An estimate from a tape measure (Hodgdon and Beckett, 1984); it can be several points out.
A little help along the way
Follow these steps. Every option is explained underneath. Everything runs in your browser; nothing is sent anywhere or kept.
- Say what you want to knowBMI, calories a day, or body fat.
- Choose your measuresCentimetres and kilograms, or feet, inches and pounds.
- Type your age, height and weightAnd your sex for calories, body fat and a child's BMI; for body fat, your waist, neck and hips.
- Read the answerIn words first, with the formula it came from.
Questions people ask
- How is body fat worked out from a tape measure?
- By the US Navy's formulas (Hodgdon and Beckett, 1984) from your height and the girth of your waist and neck, and hips for women.
- How accurate is it?
- It is an estimate: a tape measured a little differently changes it, and it can be several points out against a body scan.
- Where should I measure?
- Men's waist at the navel, women's at its narrowest, the neck just below the Adam's apple, and the hips at their widest, with the tape level and not pulled tight.
This page is the BMI and calorie calculator, opened for this one job; every other tool it has is one press away. Each of its settings is explained on the BMI and calorie calculator's own page.
Read the step-by-step guide