Body Fat Calculator
Body Fat Calculator
Ultimate Body Fat Calculator 2025: Effortless & Accurate Body Composition Tool
Take control of your health and fitness with our free Body Fat Calculator!
Knowing your body fat percentage is essential for understanding your overall health, fitness level, and progress. Our calculator uses proven formulas to give you an instant, accurate estimate of your body composition.
What is Body Fat Percentage?
Body fat percentage is the proportion of your body weight that is made up of fat. Unlike BMI, which only considers height and weight, body fat percentage gives a clearer picture of your fitness and health. Maintaining a healthy body fat percentage can reduce your risk of chronic diseases and improve your quality of life.
How to Use the Body Fat Calculator
Enter your age, gender, height, neck, waist, and (for women) hip measurements.
Select your preferred units (cm/inches).
Click the Calculate button to see your body fat percentage.
Use the Clear button to reset, or Copy to save your result.
Our tool uses the U.S. Navy Method, which is widely recognized for its accuracy.
Body Fat Calculation Methods
The U.S. Navy Method estimates body fat percentage using simple body 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
All measurements are in centimeters or inches (be consistent).
Body Fat Percentage Chart
| Category | Men (%) | Women (%) |
|---|---|---|
| Essential Fat | 2–5 | 10–13 |
| Athletes | 6–13 | 14–20 |
| Fitness | 14–17 | 21–24 |
| Average | 18–24 | 25–31 |
| Obese | 25+ | 32+ |
Values are approximate and may vary by age and source.
Why Body Fat Matters
Knowing your body fat percentage helps you:
Track your fitness progress more accurately than BMI alone
Set realistic goals for fat loss or muscle gain
Reduce your risk of heart disease, diabetes, and other health issues
Improve your athletic performance and appearance
Frequently Asked Questions
What is a healthy body fat percentage?
For men, 6–24% is considered healthy. For women, 14–31% is healthy. Athletes may have lower percentages.
How accurate is the Body Fat Calculator?
The calculator provides a good estimate using the U.S. Navy Method, but professional methods (like DEXA scans) are more precise.
How often should I check my body fat percentage?
Check every few weeks to track progress, especially if you are making changes to your diet or exercise routine.
Can I use this calculator for children?
This calculator is designed for adults. For children and teens, consult a healthcare professional.