Body Fat Calculator
Estimate your body fat percentage using the US Navy Method based on height, weight, neck, and waist measurements.
Published by:
isCalculator Editorial Team
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How to use this tool?
This calculator estimates body fat percentage using circumference measurements (U.S. Navy method). It requires metric units (cm and kg).
- Select your gender – Male or Female. For females, the hip circumference field will appear.
- Enter your age (18–100 years).
- Enter your weight in kilograms (30–300 kg).
- Enter your height in centimeters (100–250 cm).
- Enter your neck circumference in centimeters (20–60 cm).
- Enter your waist circumference in centimeters (40–150 cm).
- If female: also enter your hip circumference (40–150 cm).
- Click “Calculate” to see your body fat percentage and category.
Result: Your body fat % is shown along with a fitness category (e.g., Athletes, Average, Obese). The formula used is also displayed for reference.
Previous Results
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Frequently Asked Questions
The US Navy Method is a formula used to estimate body fat percentage based on height, neck circumference, waist circumference, and hip circumference (for women). It is widely used due to its simplicity and reasonable accuracy.
This calculator provides an estimate and may not be as accurate as methods like DEXA scans or hydrostatic weighing. However, it is a useful tool for tracking changes over time.
The US Navy Method requires hip circumference for females because the formula accounts for different fat distribution patterns between genders.
