How to Calculate Body Fat Online - Body Fat Percentage Calculator
Weight alone doesn’t tell the full story. The Body Fat Calculator estimates your body fat percentage using the U.S. Navy method—just enter a few tape measurements to get a quick read on your composition.
Why body fat percentage matters
Body fat percentage shows how much of your weight is fat versus lean mass. Tracking it helps you understand if weight changes come from muscle gain, fat loss, or both, and whether you’re in a healthy range for your age and activity level.
Measure and calculate in minutes
- Grab a flexible tape measure and stand straight.
- Open the Body Fat Calculator.
- Enter your height, neck, and waist measurements (add hip for women).
- Select your gender and measurement unit (cm or inches).
- Tap Calculate to see your estimated body fat percentage.
Typical healthy ranges
- Men: 10–20% is considered fit to athletic; 20–24% is average.
- Women: 18–28% is considered fit to athletic; 28–33% is average.
- Athletes often run lower; consult a professional for personalized targets.
Accuracy tips
- Measure in the morning before meals for consistent readings.
- Keep the tape snug but not compressing the skin.
- Re-measure two or three times and average the results.
- Track changes weekly, not daily, to see real trends.
The calculator is for informational purposes and not a medical diagnosis. Use the Body Fat Calculator regularly to spot trends and pair it with strength training, balanced nutrition, and enough rest.
