Body Fat Calculator Body Composition
Estimate your body fat percentage, fat mass and lean body mass using your body measurements and the U.S. Navy circumference-based method.
Enter your measurements in centimeters and kilograms to get a fast body composition estimate.
Body Fat Calculator
Enter your measurements below
Measurement Tip
Keep the measuring tape level and snug without compressing the skin. Use centimeters for all measurements.
Quick Examples
Click to fillEstimated Body Fat
Body Fat
Estimated percentage of body weight that is fat.
Fat Mass
Estimated mass attributed to body fat.
Lean Body Mass
Estimated body weight excluding fat mass.
Body Fat Reference Ranges
Reference categories shown for the selected gender.
| Category | Range | Status |
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U.S. Navy Body Fat Formula
Calculation Steps
What Is Body Fat Percentage?
Body fat percentage estimates how much of your total body weight consists of fat. Unlike body weight alone, it provides additional information about the relative amounts of fat and lean mass.
Body Fat %
An estimate of the percentage of total body weight represented by fat.
Fat Mass
The estimated amount of your total body weight attributed to fat.
Lean Mass
Estimated body weight remaining after subtracting estimated fat mass.
Body Fat Calculator Features
A simple calculator for estimating body composition from basic measurements.
Body Fat %
Estimate body fat percentage from simple body measurements.
Fat Mass
See the estimated amount of body weight represented by fat.
Lean Mass
Calculate estimated lean body mass alongside body fat.
Instant Results
Get results quickly without refreshing the page.
How to Use the Body Fat Calculator
Follow these simple steps to estimate your body fat percentage.
Select Gender
Choose male or female.
Enter Details
Enter age, height and weight.
Add Measurements
Enter neck, waist and hip measurements when required.
View Results
Review your estimated body fat and lean mass.
Frequently Asked Questions
Common questions about body fat percentage calculations.
What does body fat percentage mean?
Body fat percentage is an estimate of how much of your total body weight consists of fat.
Which method does this calculator use?
This calculator uses the U.S. Navy circumference-based body fat estimation method.
Why does the female calculation need hip measurement?
The female version of the U.S. Navy equation uses waist, hip and neck measurements together with height.
How should I measure my body?
Use a flexible measuring tape and keep it level and snug without compressing the skin. Consistent measurement technique helps make repeated estimates more comparable.
Is the result exact?
No. Circumference-based equations provide estimates and can differ from results obtained through laboratory or clinical body-composition methods.
Important: This calculator provides an estimate for general informational purposes. It is not a medical diagnosis and should not be treated as a substitute for professional healthcare or body-composition assessment.
Estimate Your Body Composition
Enter your measurements and get an instant estimate of body fat, fat mass and lean body mass.
Calculate Body Fat