Body Fat Calculator
Calculate your body fat percentage using the U.S. Navy Method
Your Measurements
Measure at the narrowest point
Measure at belly button level
Body Fat Percentage
0%
Calculate
Body Composition
Body Fat Mass0 lbs
Lean Body Mass0 lbs
Body Fat Categories (Men)
Essential Fat2-5%
Athletes6-13%
Fitness14-17%
Average18-24%
Obese25%+
Measurement Tips
- • Measure in the morning before eating
- • Stand relaxed, don't suck in your stomach
- • Keep tape measure level and snug
- • Take 2-3 measurements and average them
About the Navy Method
How It Works
The U.S. Navy Method is a widely-used technique for estimating body fat percentage using simple circumference measurements. It was developed by the U.S. Navy to assess body composition without expensive equipment.
The method uses logarithmic formulas based on the relationship between body circumferences and body fat percentage. While not as accurate as DEXA scans or hydrostatic weighing, it provides a good estimate for most people.
Accuracy
The Navy Method typically has an error margin of ±3-4%. For more accurate results, use DEXA scans, hydrostatic weighing, or bod pod testing.
Why It Matters
Better than BMI
BMI doesn't distinguish between muscle and fat. Body fat percentage gives a clearer health picture.
Health Indicator
Excess body fat is linked to increased risk of heart disease, diabetes, and other conditions.
Track Progress
Monitor changes in body composition during weight loss or muscle building programs.
Set Goals
Use body fat percentage to set realistic fitness goals rather than just focusing on weight.
Important Notes
✓ This is an estimate: For most accurate results, use DEXA scans or hydrostatic weighing.
✓ Measure consistently: Always measure at the same time of day for accurate tracking.
✓ Don't obsess: Body fat is one metric of many for overall health and fitness.
✓ Essential fat is vital: Don't aim for extremely low body fat - it's unhealthy.
✓ Individual variation: Genetics play a role in fat distribution and healthy ranges.
✓ Consult professionals: For health concerns, work with a doctor or certified professional.
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