Body Fat Calculator US Navy

US 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 US Navy Body Fat Formula?

The US Navy Body Fat Formula is a method developed by the US 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 US Navy 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 in inches
\( \text{neck} \) — Neck circumference in inches
\( \text{height} \) — Height in 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. Maintaining healthy body fat levels reduces risk of various health conditions and is particularly important in military fitness 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 with a flexible tape measure at the appropriate anatomical landmarks.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula accurate for everyone?
A: The formula was developed specifically for male military personnel and may be less accurate for women, elderly individuals, or those with different body compositions.

Q2: How should measurements be taken?
A: Abdomen circumference should be measured at the navel level, neck circumference at the midpoint. Measurements should be taken with the tape snug but not compressing the skin.

Q3: What are healthy body fat percentages?
A: For men: 6-24% is generally considered healthy. For women: 16-30% is typically healthy. Optimal ranges vary by age and fitness level.

Q4: Can this be used for women?
A: This specific formula is designed for men. There are different equations available for women that include additional measurements like hip circumference.

Q5: How often should body fat be measured?
A: For tracking purposes, every 4-8 weeks is sufficient as significant changes in body composition take time. Daily measurements are not recommended.