The Body Fat Percentage Calculator helps you estimate how much of your body weight comes from fat. Unlike BMI, this calculator gives a more realistic picture of your fitness level by using body measurements instead of just height and weight.
This calculator uses the trusted US Navy body fat formula and works for both men and women. Simply enter your height and body measurements to instantly see your body fat percentage along with a health category such as fitness, average, or obese.
How to use the Body Fat Calculator:
- Select your gender.
- Enter your height in centimeters.
- Enter your neck and waist measurements.
- If you are female, also enter your hip measurement.
- Click the “Calculate Body Fat %” button.
Your body fat percentage and fitness category will appear instantly.
This body fat calculator is useful for:
- People tracking fat loss or muscle gain
- Fitness beginners and gym members
- Athletes and sports enthusiasts
- Anyone who wants a better health metric than BMI
- Men and women of all age groups
Formula & Explanation
Male: Body Fat % = 86.010 × log10(Waist − Neck) − 70.041 × log10(Height) + 36.76 Female: Body Fat % = 163.205 × log10(Waist + Hip − Neck) − 97.684 × log10(Height) − 78.387
This Body Fat Calculator uses the US Navy Method, a widely accepted and non-invasive technique for estimating body fat percentage. It relies on body measurements such as height, waist, neck, and hip (for females) rather than weight alone, making it more accurate than BMI for many individuals.
The formula applies logarithmic calculations to determine fat mass distribution. Results are categorized into standard health ranges such as essential fat, fitness, average, and obese to help users understand their physical condition clearly.
Frequently Asked Questions
This calculator provides a reliable estimate using the US Navy Method, but it is not a medical diagnosis.
No. This method uses circumference measurements, not body weight.
Women store fat differently, so hip circumference improves accuracy.
Yes, but athletes may still need professional tools for exact measurements.
Yes. It does not involve any physical risk or devices.