Body Fat Calculator
Estimate your body fat percentage with the U.S. Navy tape method: only a tape measure needed.
About the Body Fat Calculator
The Navy formula estimates body density from neck and waist (plus hips for women), then converts it to fat percentage: BF% = 495/D − 450. Accuracy is within about 3-4% for most people. Categories: men 6-24% fit, women 16-30% fit, depending on age.
Informational only, not medical advice.