Navy Body Fat Calculator

How to calculate Body Fat (Navy Method)?

The Navy method uses equations developed by the U.S. Naval Health Research Center to estimate body fat percentage based on height and circumference measurements.

Formula (Men): 495 / (1.0324 - 0.19077 * log10(Waist-Neck) + 0.15456 * log10(Height)) - 450

Using the calculator: an example

Example: A male with 180cm Height, 40cm Neck, and 90cm Waist.

Step-by-step calculation:

• Measure the narrowest part of the neck and the widest part of the waist.
• Apply the logarithmic constants based on biological sex.
• Subtract the constants from the base value and divide 495 by the result.

Frequently Asked Questions

How accurate is this method?

It is generally accurate within 3-4% for most individuals but can be less precise for elite athletes or those with high muscle mass.

What is a healthy body fat range?

Healthy ranges typically vary: 10-20% for men and 18-28% for women are often considered 'fitness' or 'healthy' levels.