Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy method. For SI users, we recommend using "Metric Units". Measure to the nearest 1/4 inch (0.5 cm). This calculator uses the U.S. Navy method and also includes a BMI method calculation.

Gender

MaleFemale

Age

Weight

Height

Neck

Waist

What is Body Fat Percentage?

Body fat percentage is the proportion of fat to total body weight. Unlike BMI, which only considers height and weight, body fat percentage provides a more accurate picture of body composition by distinguishing between fat mass and lean body mass.

This calculator uses the U.S. Navy Circumference Method, which estimates body fat percentage based on body measurements. The method is considered reliable and practical, requiring only a measuring tape rather than specialized equipment.