Estimate body fat percentage using the U.S. Navy body fat formula. This free body fat calculator supports men and women, US and metric units, and shows lean body mass, fat mass, and general body fat category guidance.
For men:
Body fat is estimated from height, neck, and waist measurements.
For women:
Body fat is estimated from height, neck, waist, and hip measurements.
Lean body mass:
Calculated from body weight after estimated fat mass is removed.
Fat mass:
Estimated from body fat percentage and total body weight.
Body fat percentage can give a more detailed picture of body composition than weight alone. It is often used for fitness tracking, physique goals, and general health awareness.
Weight by itself does not show how much of the body is fat mass versus lean mass.
Your result shows estimated body fat percentage, body fat category, lean body mass, fat mass, and a rough body fat range classification.
This can help you understand body composition beyond the scale and track changes over time.
Body fat percentage is the share of your total body weight that comes from fat mass.
No. BMI uses only height and weight, while body fat percentage estimates actual body composition.
It is a useful estimate, but it is not as precise as lab testing or medical imaging methods.
The standard Navy formula for women includes hip measurement as part of the estimate.