Navy Seal Body Fat Calculator
Estimate your body fat percentage accurately at home using the U.S. Navy Method.
Body-Fat Measurement Methods
Knowing your body fat percentage can be more valuable than just knowing your weight. Different methods vary in accuracy, cost, and convenience. Here's a breakdown of the most common options.
DEXA Scan
Dual-Energy X-ray Absorptiometry (DEXA) uses low-level X-rays to measure bone density, lean mass, and fat mass.
- ✓ Highly accurate regional breakdown
- ✗ Expensive ($50-$150+)
- ✗ Requires appointment at a facility
Skinfold Calipers
Measures the thickness of skinfolds at specific sites on the body. Requires a skilled practitioner for accuracy.
- ✓ Inexpensive and portable
- ✓ Good for tracking changes over time
- ✗ High user error risk
Bioelectrical Impedance (BIA)
Sends a weak electrical current through the body. Fat resists the current more than muscle and water.
- ✓ Very convenient (smart scales)
- ✗ Highly sensitive to hydration levels
- ✗ Can vary wildly day-to-day
Visual Estimation
Comparing your physique to photo references of known body fat percentages.
- ✓ Free and immediate
- ✗ Subjective and prone to bias
- ✗ Doesn't account for visceral fat
About the Calculator
The calculator above uses the U.S. Navy Method. It is widely considered one of the most accurate ways to estimate body fat without special equipment, usually coming within 1-3% accuracy of measuring by calipers or hydrostatic weighing.
How to Measure:
- Neck: Measure the circumference of your neck just below the Adam's apple. Keep the tape flat.
- Waist (Men): Measure the circumference of your waist at the navel (belly button).
- Waist (Women): Measure the circumference of your natural waist (the narrowest point).
- Hips (Women): Measure the circumference of your hips at the widest part of your buttocks.