Body Fat % Calculator
Estimate body fat percentage using the U.S. Navy circumference method — no calipers required.
in
in
in
lbs
U.S. Navy Method
BF% = 86.01×log₁₀(waist−neck) − 70.04×log₁₀(height) + 36.76
All measurements in inches. Developed by Hodgdon & Beckett (1984).
Body Fat
17.51%
Fitness
Fat Mass
30.65
lbs
Lean Mass
144.35
lbs
Body Composition
17.5%
82.5%
Fat Mass Lean Mass
Body Fat Categories (Male)
Essential Fat
2–5%
Athletes
6–13%
Fitness
14–17%You
Average
18–24%
Obese
25%+
Body Fat % Calculator
Generated June 10, 2026Body Fat %
17.51%
Category
Fitness
Fat Mass
30.65 lbs
Lean Mass
144.35 lbs
Inputs (male, imperial)
Height70 in
Neck15 in
Waist34 in
Weight175 lbs
Body Fat Categories (Male)
| Category | Range | Your Status |
|---|---|---|
| Essential Fat | 0% – 5% | |
| Athletes | 5% – 14% | |
| Fitness | 14% – 18% | ← You are here |
| Average | 18% – 25% | |
| Obese | 25% – 60%+ |