Body fat
Body Fat Calculator
Estimate body fat % with a tape measure using the US Navy method.
Free tool · Body fat
These four formulas were built for medication dosing and general health, not physiques. They're a sanity check; if you train, the body fat for abs calculator gives a more useful target.
Results
These formulas ignore muscle. If you lift, your best weight for visible abs is usually higher; use the body fat for abs calculator instead.
None is definitive. They give a range; the spread between them is a reminder that build matters.
The formulas assume average muscle. More muscle means a higher healthy weight at the same body fat.
Body fat
Estimate body fat % with a tape measure using the US Navy method.
Body fat
See the body fat % and weight where your abs should start to show.
Body fat
Work out how much of your weight is muscle, bone and water.
Body fat
Fat-free mass index: how muscular you are for your height.