Calculate your body fat percentage using the US Navy method
Enter Your Measurements
Measure at the navel (men) or narrowest point (women)
Measure below the larynx, sloping downward to the front
Your Body Fat Result
Enter your measurements above to estimate body fat percentage
Body Fat Categories (ACE)
Male
Female
US Navy Method
Uses circumference measurements with a logarithmic formula validated by the US Navy for field use.
How to Measure
Use a flexible tape measure. Keep it snug but not tight. Measure to the nearest 0.5 cm or 0.25 inch.
Lean Body Mass
Your lean mass includes muscles, bones, organs, and water. Enter your weight to see this breakdown.
This estimate uses the US Navy circumference method. Results may vary ±3–4% from DEXA scans. Consult a healthcare professional for clinical assessment.
Estimate your body fat percentage using the US Navy circumference method — one of the most widely used field techniques validated for accuracy. Enter your height, waist, and neck measurements (plus hips for women) to get your body fat %, fitness category, and optional lean/fat mass breakdown.
How to Use
- 1Select metric (cm) or imperial (inches)
- 2Choose your gender
- 3Enter height and circumference measurements
- 4Optionally enter weight to see lean and fat mass
- 5View your body fat percentage and fitness category