What is it & why use it?
Calculate your body fat percentage using weight, height, waist, neck, and gender with our Body Fat Calculator. This tool on Calci.in helps individuals and fitness enthusiasts assess their fat percentage more accurately than BMI.

Formula (explained)
Body Fat % (US Navy Method) = 495 / (1.0324 – 0.19077 × log10(waist – neck) + 0.15456 × log10(height)) – 450
Variables: waist, neck, and height measurements (in cm), log base 10. Formula differs for men and women.

Example calculation
Male: Height 175cm, Waist 85cm, Neck 40cm → ≈ 18% body fat.

Benefits & use cases
• Track fitness goals
• Better than BMI for athletes
• Helps in weight loss planning

Related calculators on Calci.in
BMI Calculator
BMR Calculator
Protein Intake Calculator

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FAQs
Q1: Is body fat % better than BMI?
A: Yes, it gives a clearer picture of fat vs muscle.
Q2: What is healthy body fat %?
A: Ranges: Men 10–20%, Women 18–28% (may vary).
Q3: Which method is used?
A: This calculator uses the US Navy circumference method.
Q4: Do athletes have lower body fat?
A: Yes, athletes often have below-average body fat.