Body Fat Calculator For Men

US Navy Body Fat Formula:

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

Estimated 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 body fat formula:

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

Where:

\( abdomen \) — Abdomen circumference at navel level (inches)
\( neck \) — Neck circumference below larynx (inches)
\( height \) — Height (inches)

Explanation: The formula uses logarithmic transformations of the difference between abdomen and neck measurements relative to height to estimate body fat percentage.

3. Importance of Body Fat Measurement

Details: Body fat percentage is a more accurate indicator of health than body weight alone. It helps assess health risks associated with obesity and monitor fitness progress.

4. Using the Calculator

Tips: Enter abdomen and neck circumferences in inches, height in inches. All values must be valid (measurements > 0, abdomen > neck). For accurate results, measurements should be taken with a flexible tape measure at the specified locations.

5. Frequently Asked Questions (FAQ)

Q1: Is this formula accurate for all men?
A: While generally accurate for most adult men, it may be less precise for extremely muscular individuals, elderly, or those with unusual body proportions.

Q2: How often should I measure my body fat?
A: For tracking changes, monthly measurements are typically sufficient as body fat changes slowly over time.

Q3: What is a healthy body fat percentage for men?
A: Generally, 8-19% is considered healthy for most adult men, though optimal ranges vary by age and fitness level.

Q4: When is the best time to take measurements?
A: Take measurements in the morning before eating or drinking, as abdominal measurements can fluctuate throughout the day.

Q5: Are there other methods to measure body fat?
A: Yes, other methods include DEXA scans, hydrostatic weighing, skinfold calipers, and bioelectrical impedance scales.