How accurate is the US Navy method?

It is considered accurate within 1-3% for most people when measurements are taken correctly.

Why do I need to measure my neck?

The formula uses neck circumference to estimate lean-to-fat distribution, as neck size often correlates with muscle mass/frame size rather than just fat.

What is a healthy body fat range?

For men, 14-24% is generally considered healthy. For women, 21-31% is the typical healthy range.

Body Fat Percentage Calculator

Calculate your body fat percentage using the US Navy method. Track your fitness progress accurately.

body fatfat percentageus navy methodcomposition

Disclaimer: This tool provides estimates for informational and educational purposes only. It does not constitute professional financial, medical, or legal advice. Please consult with a qualified professional before making any significant decisions based on these estimations.

Common Use Cases

general awareness and educational estimates
wellness planning alongside professional guidance
tracking simple ranges over time

What is Body Fat Percentage Calculator?

The Body Fat Calculator estimates the percentage of your total body weight that consists of fat tissue. It uses the U.S. Navy formulation, which is widely regarded as a reliable method for estimation without using calipers or hydro-static weighing. Knowing your body composition is often a better indicator of health than weight or BMI alone.

How to Use This Tool

1Enter your gender, age, height, and weight
2Measure and enter neck, waist, and hip (for females) circumference
3View your estimated body fat percentage and category

Example

Input

Male, Waist: 90cm, Neck: 40cm, Height: 180cm

Output

Body Fat: 18.5% (Fitness)

Before You Rely on This Result

UtilityNest keeps tools in this category focused on transparency: short instructions, a worked example, and plain-language guidance so you can review the result before you depend on it.

Check that the inputs reflect your real situation before you rely on the estimate.
Rules, rates, health needs, and legal requirements may vary by country, state, insurer, or provider.
Use this result as a starting point, then confirm important decisions with official sources or a qualified professional.

Frequently Asked Questions

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