Body Fat Percentage Calculator
Estimate your body fat using the US Navy method, a reliable formula based on circumference measurements.
Your Estimate
Enter your measurements and click Calculate.
What is a Body Fat Calculator?
A body fat calculator estimates the percentage of your total body weight that is fat. This tool uses the U.S. Navy method, which relies on circumference measurements (like your neck, waist, and hips) to provide a convenient and surprisingly accurate estimate of body composition without the need for special equipment.
How to Use This Tool
- Select Units and Gender: Choose between Metric (cm/kg) or Imperial (in/lbs) and select your gender.
- Enter Your Measurements: Take your measurements with a flexible tape measure and enter them into the fields for age, height, weight, neck, and waist. If you are female, also measure and enter your hip circumference.
- Click Calculate: The calculator will instantly show your estimated body fat percentage, your category (e.g., Fitness, Average), and a breakdown of your fat mass and lean mass.