Navy Percent Body Fat Calculator

Navy Body Fat Formula:

\[ \text{Body Fat %} = 86.010 \times \log_{10}(\text{abdomen} - \text{neck}) - 70.041 \times \log_{10}(\text{height}) + 36.76 \]

Body Fat Percentage:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Navy Body Fat Formula?

The Navy Body Fat Formula is a method developed by the U.S. Navy to estimate body fat percentage using circumference measurements. It provides a practical and accessible way to assess body composition without specialized equipment.

2. How Does the Calculator Work?

The calculator uses the Navy Body Fat Formula:

\[ \text{Body Fat %} = 86.010 \times \log_{10}(\text{abdomen} - \text{neck}) - 70.041 \times \log_{10}(\text{height}) + 36.76 \]

Where:

\( \text{abdomen} \) — Abdomen circumference (inches)
\( \text{neck} \) — Neck circumference (inches)
\( \text{height} \) — Height (inches)

Explanation: The formula uses logarithmic transformations of circumference measurements to estimate body fat percentage, specifically designed for male personnel.

3. Importance of Body Fat Measurement

Details: Body fat percentage is a key indicator of overall health and fitness. It helps assess health risks associated with obesity and is used by military organizations to maintain physical readiness standards.

4. Using the Calculator

Tips: Enter abdomen and neck circumferences in inches, height in inches. All values must be valid (measurements > 0, abdomen > neck). Measurements should be taken at the natural waistline and just below the larynx for neck.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula accurate for everyone?
A: The formula was developed specifically for military personnel and may have varying accuracy for different populations and body types.

Q2: What are healthy body fat percentages?
A: For men: 6-24% is generally considered healthy, with 6-17% being ideal for athletes and 18-24% acceptable for general population.

Q3: How should measurements be taken?
A: Measurements should be taken with a flexible tape measure, with the tape snug but not compressing the skin. Abdomen at natural waistline, neck just below the larynx.

Q4: Are there female versions of this formula?
A: Yes, the Navy has a separate formula for females that includes additional measurements like hip circumference.

Q5: How often should body fat be measured?
A: For fitness tracking, monthly measurements are sufficient as body composition changes slowly over time.