Body Fat Calculator
Estimate your body fat percentage using the US Navy method. More accurate than BMI for assessing body composition.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method
Formula
Navy Method: Uses height, waist, neck (and hip for women)How to Use This Calculator
- 1
Select biological sex
Choose male or female (different formulas and measurements required).
- 2
Enter your height
Input your height in inches or centimeters.
- 3
Measure and enter waist
Measure at navel level for men, narrowest point for women.
- 4
Measure and enter neck
Measure around the narrowest part of your neck.
- 5
For women: measure hips
Measure at the widest point of your hips.
- 6
View your results
See your body fat percentage and fitness category.
Frequently Asked Questions
How accurate is the Navy method?
The Navy method is reasonably accurate (within 3-4% of more precise methods like DEXA) and is used by the US military. It's more accurate than BMI for assessing body composition.
What is a healthy body fat percentage?
For men: 10-20% is fitness range, 18-25% is average. For women: 18-28% is fitness range, 25-32% is average. Athletes may be lower, but essential fat (2-5% men, 10-13% women) is necessary for health.
How do I measure correctly?
Use a flexible tape measure. Keep it level and snug but not tight. Measure in the morning before eating. Take multiple measurements and average them for accuracy.