What is the maximum body fat percentage allowed in the US Navy?

For males aged 18-21, the maximum allowable body fat is 22% (23% for ages 22-29). For females aged 18-21, the maximum is 33% (34% for ages 22-29).

Updated: August 2026 • Verified v1.2

US Navy Body Fat Percentage & Composition Calculator

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Male: %Fat = 86.010*log10(waist-neck) - 70.041*log10(height) + 36.76; Female: %Fat = 163.205*log10(waist+hip-neck) - 97.684*log10(height) - 78.387

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Understanding Your Results

Calculates body fat percentage using the official US Navy logarithmic formula, classifies body composition (Athletes, Fitness, Average, Obese), breaks down fat vs lean mass in pounds, and verifies military readiness compliance.

Practical Guidance & Next Steps

Measure circumference with a flexible tape measure held taut without compressing the skin; take measurements at the navel for waist and around the widest point of the neck below the larynx.

What is this?

A clinical fitness utility that calculates body fat percentage using the official US Navy circumference method.

How does it work?

1. Select Male or Female formula. 2. Enter weight, height, neck, waist (and hips for females) measurements. 3. View body fat %, fitness category, fat mass, lean mass, and Navy standard compliance.

Why use it?

Provides an accurate body fat estimate at home with only a standard measuring tape.

Technical Scope & Calculation Limitations

Implements official DoD / US Navy circumference method formulas.

Frequently Asked Questions

Studies published in sports medicine journals have found the US Navy circumference method to be within 1% to 3% accuracy of DEXA scans and hydrostatic underwater weighing for most healthy adults.

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