Body Fat Percentage Calculator

Calculate your body fat percentage accurately based on gender and body measurements.

Inputs

Results

Enter your measurements to calculate body fat percentage

Calculations based on the U.S. Navy Method.

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How the Body Fat Calculator Works

U.S. Navy Method: Body Fat % (Men) = 86.010 × log10(waist - neck) - 70.041 × log10(height) + 36.76

This calculator uses the U.S. Navy Method to estimate body fat percentage based on body circumference measurements. This method is accurate and easy to use without specialized equipment, providing a reliable estimate of body composition.

  1. 1

    Enter Data

    Input your gender, height, weight, and circumference measurements

  2. 2

    Calculate

    The calculator applies the U.S. Navy formula to your measurements

  3. 3

    View Results

    Get your body fat percentage and health category classification

Use Cases

Weight Loss Tracking

Used by dieters to track fat loss, not just weight loss

Bodybuilding

Monitor body fat during bulking and cutting phases

General Health Assessment

Determine if your body fat is within a healthy range

Tips

  • 1

    Measure waist at navel level for accurate readings

  • 2

    Take measurements in the morning before eating for consistency

  • 3

    Use a flexible, non-stretchable measuring tape

  • 4

    Take 3 measurements and use the average for better accuracy

Common Mistakes

  • Pulling the tape too tight, giving inaccurate readings

  • Measuring over clothing instead of directly on skin

  • Not standing straight during measurement

  • Comparing results between different measurement methods

Frequently Asked Questions

What is a healthy body fat percentage?
For men: 10-20% is healthy. For women: 18-28% is healthy. Athletes may have lower percentages.
How often should I measure body fat?
Every 2-4 weeks is recommended to effectively track changes.
How accurate is this method?
The U.S. Navy Method is accurate within ±3-4% compared to lab methods.
Why do men and women have different ranges?
Women biologically need higher body fat for hormonal and reproductive functions.

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