Body Fat Calculator
Free online Body Fat Calculator.
Calculator
How to Use
- Enter the required values
- Click Calculate to see the result
- Review the detailed output
Formula
Navy Method: Body Fat% = 86.010 x log10(waist - neck) - 70.041 x log10(height) + 36.76 (men). Women include hip measurement. Results vary by formula used.
Example Calculations
Male Body Fat
Input: Male, 5'10", 180 lbs, neck 15in, waist 34in
Result: Body Fat: 16.2% - Fitness category
Female Body Fat
Input: Female, 5'5", 140 lbs, neck 13in, waist 28in, hip 38in
Result: Body Fat: 22.8% - Fitness category
Athletic Range
Input: Male, 6'0", 175 lbs, neck 15.5in, waist 31in
Result: Body Fat: 10.5% - Athlete category
About This Calculator
Free online body fat calculator. Calculate instantly in your browser with our easy-to-use tool. No sign-up required.
Our body fat calculator is free, easy to use, and provides instant results. All calculations are performed in your browser for privacy and speed.
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Frequently Asked Questions
Healthy body fat %?
Men: 10-20%. Women: 18-28%. Women carry more naturally. Athletes have lower percentages.
How is body fat measured?
Skinfold calipers, bioelectrical impedance, DEXA scans, and Navy circumference method.
Navy body fat method?
Uses neck, waist, hip circumference with height to estimate body fat percentage.
Body fat vs BMI?
Body fat directly measures fat. BMI only considers weight-to-height and cannot distinguish muscle from fat.
How to reduce body fat?
Moderate calorie deficit with cardio and strength training. 1-2 lbs/week. Protein preserves muscle.