Body Fat Calculator

Estimate your body fat percentage using common measurement methods.

Measurements

US units Metric

Calculation method

Sex Age

Height, ft Height, in

Weight

Neck

Waist

Measure relaxed, level, and close to the skin. For the Navy method, men use neck and waist; women also use hips.

Results Enter your measurements to start.

Estimated body fat - US Navy tape method

Category - -

Fat mass -

Lean mass -

Low Athletic Fitness Average High

BMI -

Height -

Weight -

Reference ACE

This calculator gives a practical estimate, not a medical diagnosis. Track the same method over time for the most useful trend.

Tool Introduction

Estimate body fat percentage from everyday measurements. The default US Navy tape method uses circumference measurements and is common in fitness, military, and coaching settings. A BMI-based estimate is available when tape measurements are not handy.

US units are shown first because inches and pounds are still the default for many U.S. users. You can switch to metric at any time; the calculator converts values locally in your browser.