How to Use Online Body Fat Calculator
Select your gender (male/female)
Enter your age
Choose your preferred measurement method from the dropdown (Navy Method, BMI Method, etc.)
Enter your height and weight measurements
Click "Calculate" to see your results
Healthy Body Fat Percentage Ranges
For Men
| Category | Body Fat % |
|---|---|
| Essential Fat | 2-5% |
| Athletes | 6-13% |
| Fitness | 14-17% |
| Acceptable | 18-24% |
| Obesity | 25%+ |
For Women
| Category | Body Fat % |
|---|---|
| Essential Fat | 10-13% |
| Athletes | 14-20% |
| Fitness | 21-24% |
| Acceptable | 25-31% |
| Obesity | 32%+ |
Body Fat Estimation Methods
U.S. Navy Method Formula
This is one of the most accurate methods that uses body circumference measurements:
For Men:
Body Fat % = 86.010 × log10(waist - neck) - 70.041 × log10(height) + 36.76
For Women:
Body Fat % = 163.205 × log10(waist + hip - neck) - 97.684 × log10(height) - 78.387
Example Calculation:
For a male with:
- Waist: 85 cm
- Neck: 37 cm
- Height: 175 cm
Body Fat % = 86.010 × log10(85 - 37) - 70.041 × log10(175) + 36.76 = 17.6%
Frequently Asked Questions
What is a healthy body fat percentage?
A healthy body fat percentage varies by gender and age. For men, 10-20% is considered healthy, while for women, 20-30% is the healthy range. Athletes may have lower percentages.
How accurate is this calculator?
The Navy Method formula has an accuracy of ±3-4% compared to underwater weighing. The BMI method is less accurate but provides a reasonable estimate for most people.
How often should I measure my body fat?
Monthly measurements are recommended when tracking progress. Measure at the same time of day under similar conditions for consistent results.
Why is body fat percentage important?
Body fat percentage is a better indicator of health than weight alone. It helps assess health risks and fitness goals more accurately than BMI or scale weight.