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Body Fat Calculator

Estimate your body fat percentage using the U.S. Navy Method or BMI-based method. Get lean mass, fat mass, and your fitness category based on ACE guidelines.

Body Measurements

Enter your measurements for an accurate body fat estimate

Calculation Method
Personal Information
Method-Specific Measurements
Body Fat
--%
Lean Body Mass
-- lbs
muscle, bone, water
Fat Mass
-- lbs
total fat weight
BMI
--
body mass index

ACE Body Fat % (Men)

Essential Fat2–5%
Athlete6–13%
Fitness14–17%
Average18–24%
Obese25%+

ACE Body Fat % (Women)

Essential Fat10–13%
Athlete14–20%
Fitness21–24%
Average25–31%
Obese32%+

Measurement Methods Explained

U.S. Navy Method

Neck, waist, (hip for women) circumferences

BMI Method

Uses height, weight, age, sex (less accurate)

Skinfold (3-site)

Chest, abdomen, thigh calipers (men) or tricep, suprailiac, thigh (women)