Body fat percentage measures the portion of total body weight composed of fat tissue rather than muscle, bone, and water. Tracking body composition provides a far clearer picture of fitness progress than body weight alone.
Body Fat Percentage Calculator
Reviewed
ResultUpdates as you type
Body Fat %16.9%
Fat Mass12.7 kg
Lean Mass62.3 kg
- Lean Mass83.1%
- Fat Mass16.9%
Calculate your body fat percentage, fat mass, and lean body mass using the accurate U.S. Navy circumference method.
Calculate your body fat percentage, fat mass, and lean body mass with precision using the U.S. Navy circumference body composition method.
How to use
- Select your unit system (Metric or Imperial).
- Choose your sex and enter your age.
- Enter your height, weight, and neck measurement.
- Enter your waist measurement (and hip measurement for females).
- Read your body fat percentage and fat vs lean mass breakdown.
Formula
The U.S. Navy method estimates body fat percentage using body height and circumference measurements.
Male Body Fat Formula
BF% = 495 / (1.0324 - 0.19077·log10(waist - neck) + 0.15456·log10(height)) - 450Female Body Fat Formula
BF% = 495 / (1.29579 - 0.35004·log10(waist + hip - neck) + 0.22100·log10(height)) - 450Frequently asked questions
How accurate is the Navy Body Fat Calculator?
The U.S. Navy formula is accurate within 3% to 4% of a clinical DEXA scan for most adults.
What is a healthy body fat percentage?
Healthy body fat ranges are generally 10% to 20% for adult men and 18% to 28% for adult women.