Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy method. All you need are basic body measurements — no special equipment required.
Body Fat Percentage
Fat Mass
Lean Mass
How to Use
- Select your gender.
- Enter your height in centimeters.
- Measure your waist at the navel and neck at the narrowest point.
- For women, also measure the widest part of your hips.
- Optionally enter weight to see fat mass and lean mass.
- Click “Calculate” to see your estimated body fat percentage.
Frequently Asked Questions
How accurate is the Navy method?
The U.S. Navy method is accurate within 1-3% for most people when measurements are taken correctly. It is one of the most reliable estimation methods without specialized equipment.
What is a healthy body fat percentage?
For men: 10-20% is considered fit, 21-24% acceptable. For women: 18-28% is fit, 29-31% acceptable. Athletes may be lower.
How should I take measurements?
Use a flexible tape measure. Measure waist at navel level (relaxed, not sucked in), neck at narrowest point below the larynx, and hips at widest point.