Body Fat Calculator
Calculate your body fat percentage using the U.S. Navy Method. Estimate body fat levels for men and women and determine your body fat category instantly.
Use our free online body fat calculator to get accurate results instantly. The calculator is designed to be fast, easy to use, mobile-friendly, and suitable for everyday calculations.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy Method.
How the Body Fat Calculator Works
Step 1
Select Gender
Choose your gender to apply the correct body fat formula.
Step 2
Enter Measurements
Provide your height, neck, waist, and hip measurements if required.
Step 3
Calculate Body Fat
The calculator uses the U.S. Navy Method to estimate body fat percentage.
Step 4
View Results
See your body fat percentage and body fat category instantly.
Body Fat Percentage Formula
Men: Body Fat % = 86.010 × log10(Waist − Neck) − 70.041 × log10(Height) + 36.76 Women: Body Fat % = 163.205 × log10(Waist + Hip − Neck) − 97.684 × log10(Height) − 78.387
The U.S. Navy Method estimates body fat percentage using body measurements. It is one of the most widely used methods for estimating body composition without specialized equipment.
Example Calculation
Input: Male, Height: 175 cm, Neck: 40 cm, Waist: 85 cm
Output: Estimated Body Fat Percentage ≈ 18.5%
Common Uses
- • Fitness tracking
- • Weight loss monitoring
- • Muscle gain programs
- • Body composition analysis
- • Health assessments
- • Sports performance tracking
Frequently Asked Questions
What is body fat percentage?
Body fat percentage represents the proportion of your body weight that consists of fat tissue compared to lean mass such as muscles, bones, and organs.
How is body fat percentage calculated?
This calculator uses the U.S. Navy Method, which estimates body fat percentage using body measurements such as height, neck, waist, and hip circumference.
Is body fat percentage more useful than BMI?
Yes. Body fat percentage provides a better understanding of body composition because it distinguishes fat mass from lean body mass, whereas BMI only considers height and weight.
What is a healthy body fat percentage?
Healthy body fat ranges vary by age and gender. For most adult men, 10%–20% is considered healthy, while 18%–28% is generally considered healthy for women.
Is the U.S. Navy Method accurate?
The U.S. Navy Method provides a reliable estimate for most people. However, laboratory methods such as DEXA scans are generally more accurate.
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