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    Body Fat CalculatorFree Online Health Tool

    Body Fat Calculator is a free online health tool. Estimate your body fat percentage using the U.S. Navy circumference method. Free body composition calculator.

    Your Measurements
    Enter your body measurements (in cm)
    Your Body Fat
    Estimated body composition

    Body Fat Percentage

    16.9%

    Fitness

    Body Fat Categories (Men):

    Essential Fat: 2-5%

    Athletes: 6-13%

    Fitness: 14-17%

    Average: 18-24%

    Obese: >25%

    100% Private100% Private
    InstantInstant
    Any DeviceAny Device
    Free ForeverFree Forever
    How to useHow to use & Tips

    Steps

    1. 1Select your gender
    2. 2Enter your height in centimeters
    3. 3Measure and enter your waist circumference at the narrowest point
    4. 4Measure and enter your neck circumference
    5. 5Women: also enter hip circumference at the widest point
    6. 6View your body fat percentage and category

    Use Cases

    • -Track body composition changes during fitness programs
    • -Determine if weight loss is fat loss or muscle loss
    • -Set realistic body fat goals
    • -Monitor health metrics beyond just weight
    • -Compare body composition before and after diet changes

    About Body Fat Calculator

    Everything you need to know about this tool and how to get the most out of it.

    What is Body Fat Calculator?

    What is Body Fat Calculator?

    A Body Fat Calculator estimates your body fat percentage using the U.S. Navy circumference method. It uses body measurements (height, waist, neck, and hip for women) to estimate the percentage of your body weight that is fat.
    How Body Fat Calculator Works

    How Body Fat Calculator Works

    The U.S. Navy method uses a formula based on body circumference measurements. For men: waist and neck measurements. For women: waist, hip, and neck measurements. These are plugged into a logarithmic formula to estimate body density and fat percentage.
    Why Use Body Fat Calculator?

    Why Use Body Fat Calculator?

    Body fat percentage is a better indicator of health and fitness than weight alone. Two people can weigh the same but have very different body compositions. Tracking body fat helps you understand if you're losing fat vs muscle.
    Tips

    Tips & Best Practices

    • 1Measure at the same time of day for consistency (morning is best)
    • 2Take measurements at the narrowest point for waist and widest for hips
    • 3The Navy method is an estimate — DEXA scans and hydrostatic weighing are more accurate

    Frequently Asked Questions