Body Fat Calculator
Estimate your body fat percentage using your BMI, Age, and Gender.
- Free Online Tool
- Instant Results
- Mobile Friendly
- No Installation
- Secure & Private
Understanding This Calculator
Body Fat Formula (Deurenberg)
This calculator relies on the Deurenberg formula, which relates BMI, age, and gender to estimated body fat percentage.
Body Fat % = (1.20 × BMI) + (0.23 × Age) - (10.8 × Sex) - 5.4
- BMI: Body Mass Index
- Age: Years
- Sex: 1 for Men, 0 for Women
Example 1
Male (1), Age 30, BMI 25.
- Calculation: (1.2×25) + (0.23×30) - (10.8×1) - 5.4
- 30 + 6.9 - 10.8 - 5.4 = 20.7%
Example 2
Female (0), Age 30, BMI 25.
- Calculation: (1.2×25) + (0.23×30) - (10.8×0) - 5.4
- 30 + 6.9 - 0 - 5.4 = 31.5%
ACE Reference Chart
| Description | Women | Men |
|---|---|---|
| Essential Fat | 10-13% | 2-5% |
| Athletes | 14-20% | 6-13% |
| Fitness | 21-24% | 14-17% |
| Average | 25-31% | 18-24% |
| Obese | 32%+ | 25%+ |
How to Use
- Enter your known BMI (use BMI calculator if needed).
- Enter Age and Gender.
Frequently Asked Questions
Is this medical advice?
No, this tool is for informational purposes only. Always consult a healthcare professional for medical advice.
Is this calculator free to use?
Yes, this calculator is 100% free and does not require any registration or subscription.
Is it mobile-friendly?
Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.