Body Fat Calculator

Estimate your body fat percentage with the US Navy method. All you need is a tape measure.

Your details

Gender
cm
ftin
cm
cm
cm
kg

How it works

The Navy method uses your height plus neck and waist measurements (and hips for women) to estimate body fat.

Measure neck just below the larynx, waist at the navel (men) or narrowest point (women), and hips at the widest point. Keep the tape snug but not tight.

It is an estimate and is best for tracking change over time. Measure at the same time of day, under the same conditions.

Questions

How accurate is the Navy method?

It is usually within a few percentage points of lab methods for most people, but it is still an estimate.

What is a good body fat level?

For men, roughly 14 to 17% is considered fit and for women about 21 to 24%. Athletic ranges are lower.

How often should I measure?

Every two to four weeks is enough. Daily changes are mostly water and measurement noise.