Body Fat Calculator

Body Fat Calculator

Our free Body Fat Calculator helps you estimate your body fat percentage using the U.S. Navy Method. Enter your height, neck, waist, and (for women) hip measurements to calculate your body fat percentage quickly and efficiently.

Understanding Body Fat Calculators

Body fat calculators estimate the percentage of fat in your body based on measurements. The U.S. Navy Method requires gender, height, neck, waist, and hip (for women) values.

Key Components

  • Height: Total height in cm or inches.
  • Neck Circumference: Measured below the Adam’s apple.
  • Waist Circumference: Men: at narrowest point; Women: at navel.
  • Hip Circumference: Women only, measured at widest point.

Formula

For Men: %BF = 495 / (1.0324 - 0.19077 × log10(waist - neck) + 0.15456 × log10(height)) - 450
For Women: %BF = 495 / (1.29579 - 0.35004 × log10(waist + hip - neck) + 0.22100 × log10(height)) - 450

Example

Male, Height 68 in, Neck 15 in, Waist 32 in → ~14.2% Body Fat.

Uses

  • Track fitness and fat loss progress.
  • Estimate healthy ranges for athletes or general population.
  • Assist in diet and exercise planning.

Limitations

Body fat calculators give estimates. Professional tools provide more accuracy. Use for guidance, not medical diagnosis.

Frequently Asked Questions

How accurate is the Body Fat Calculator?

It uses the U.S. Navy Method, providing a reasonable estimate. For precise results, consult a fitness professional.

Why do women need hip measurements?

Women's fat distribution differs from men’s, and hip circumference is part of the formula for accuracy.

Can this replace medical testing?

No. This is for fitness tracking, not medical diagnosis.