Body Fat Percentage Calculator
Estimate your body fat percentage using the U.S. Navy method. Get insights into your body composition and health status.
Body Fat Categories
Men
Women
About Body Fat Percentage
What is the U.S. Navy Method?
The U.S. Navy method estimates body fat percentage using circumference measurements of specific body parts. It's a practical, non-invasive way to assess body composition without specialized equipment.
How to measure accurately
Use a flexible tape measure. Measure your waist at the navel, your neck just below the larynx (Adam's apple), and for women, your hips at the widest point. Take measurements in the morning for consistency.
Accuracy
This method provides an estimate with about 3-4% accuracy. For more precise measurements, consider DEXA scans, hydrostatic weighing, or professional body composition analysis.
How We Calculate Your Body Fat
The U.S. Navy Method
Developed by the U.S. Navy, this method uses circumference measurements to estimate body fat percentage. It's one of the most practical methods that doesn't require specialized equipment.
Formula for Men
Body Fat % = 495 ÷ (1.0324 - 0.19077 × log₁₀(waist - neck) + 0.15456 × log₁₀(height)) - 450
Formula for Women
Body Fat % = 495 ÷ (1.29579 - 0.35004 × log₁₀(waist + hip - neck) + 0.22100 × log₁₀(height)) - 450
Women require hip measurement because fat distribution differs between sexes.
Fat Mass & Lean Mass
Fat Mass = Body Weight × (Body Fat % ÷ 100)
Lean Mass = Body Weight - Fat Mass
Measurement Tips
For best accuracy: measure waist at navel level (not narrowest point), neck just below the larynx, and hips at the widest point. Take measurements in the morning before eating.
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