Body Fat Calculator
Calculate your body fat percentage using the US Navy circumference method.
Calculate Your Body Fat
Your Results
How body fat is calculated
The US Navy method uses body circumferences and height to estimate body fat percentage. It's simple and fairly accurate.
BF% = 495 / (1.0324 - 0.19077 × log(waist-neck) + 0.15456 × log(height)) - 450Women:
BF% = 495 / (1.29579 - 0.35004 × log(waist+hip-neck) + 0.22100 × log(height)) - 450
Categories: Essential (<6% men, <14% women), Athletes (6-13% men, 14-20% women), Fitness (14-17% men, 21-24% women), Average (18-24% men, 25-31% women), Obese (25%+ men, 32%+ women).
FAQs
How do I measure my waist?
Measure around your belly button while standing relaxed. Don't suck in your stomach.
How do I measure my neck?
Measure just below your Adam's apple (voice box). Keep the tape snug but not tight.
How do I measure my hips (women)?
Measure around the widest part of your hips and buttocks.
Is this method accurate?
It's reasonably accurate (within 3-4%) for most people, but not as precise as DEXA scans.
What's a healthy body fat percentage?
For men: 10-20%. For women: 18-28%. Athletes are often lower.