Body Fat Percentage Calculator

Estimate body fat percentage and lean body mass using the U.S. Navy circumference method with neck, waist, and hip measurements.

Summary:A body fat calculator estimates body composition using body circumference dimensions and height. It provides an estimated body fat percentage and categorization without requiring hydrostatic weighing or DEXA scans.
Estimated Body Fat
0%

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How to Use Body Fat Percentage Calculator

Follow these steps to use the Body Fat Calculator: 1. Select your gender and enter your height in centimeters or inches. 2. Measure your neck circumference and input the value in the field. 3. Input your waist circumference (and hips for females) measured at standard boundaries. 4. Review your body fat percentage, fat mass, and lean body mass. Enter your measurements to calculate the estimate. This tool performs calculations locally in your browser.

Body Fat Percentage Calculator Formula / How It Works

The calculator uses log-based ratios of waist, neck, hip, and height parameters conforming to the standard US Navy body fat estimation equations.

Formula:US Navy equations using log-based ratios of height, neck, waist, and hips.
Example Calculation:

For example, let's look at a male with a height of 180 cm, neck of 38 cm, and waist of 86 cm. By entering these values into the tool, you will get an estimated body fat percentage of 15.4%, fat mass of 12.3 kg, and lean mass of 67.7 kg instantly.

Frequently Asked Questions

A standard equation used by the military to estimate body fat using height and circumference measurements.

Fitness levels generally range from 14% to 24%; essential fat is 2-5%.

Fitness levels generally range from 21% to 31%; essential fat is 10-13%.

It is a good estimate, usually within 3-4% of DEXA scan accuracy.

The weight of everything in your body (bones, muscles, organs, water) excluding fat.

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