Body Fat Percentage Calculator
Easily estimate your body fat percentage using height, waist, hip circumferences, height and gender.
Calculate Your Body Fat Percentage
Calculate Your Body Fat Percentage (US Navy Method)
This calculator estimates your body fat percentage using a formula used by the US Navy. This method provides a quick and easy way to assess your body composition.
**Formulas (When measurements are in inches):**
**Men:** %Fat = 86.010 * log10(Waist - Neck) - 70.041 * log10(Height) + 36.76
**Women:** %Fat = 163.205 * log10(Waist + Hip - Neck) - 97.684 * log10(Height) - 78.387
The result is an approximation and is not as sensitive as professional body fat analysis methods (e.g. DEXA scan).
What is Body Fat Percentage and Why is it Important?
**Body fat percentage** is the ratio of your body fat mass to your total body mass. It is an important indicator of your overall health and fitness level, as it shows not only your weight but also how much of your body is fat and how much is lean mass (muscle, bone, water). A high body fat percentage increases the risk of many obesity-related health problems (such as heart disease and diabetes), while a very low body fat percentage can also lead to health problems.
Why Is It Important?
- **Health Risk Assessment:** Having a healthy fat ratio reduces the risk of chronic disease.
- **Fitness Tracking:** Shows the effectiveness of workouts for athletes and fitness enthusiasts.
- **Goal Setting:** Guides goals for losing weight or gaining muscle mass.
Body Fat Categories (American Council on Exercise - ACE Guide):
Body Fat Percentage Categories for Men
| Category | Fat Content (%) |
|---|---|
| Essential Oil | 2-5% |
| Athletes | 6-13% |
| Fitness (Healthy) | 14-17% |
| Average | 18-24% |
| Obese | >= 25% |
Body Fat Percentage Categories for Women
| Category | Fat Content (%) |
|---|---|
| Essential Oil | 10-13% |
| Athletes | 14-20% |
| Fitness (Healthy) | 21-24% |
| Average | 25-31% |
| Obese | >= 32% |
Body Fat Percentage Measurement Methods:
- **DEXA Scan:** It is one of the most accurate methods using X-rays.
- **Hydrostatic Weighing (Underwater Weighing):** Determines fat percentage by measuring body density.
- **Bioelectrical Impedance Analysis (BIA):** Measures resistance by passing electrical current through the body (less accurate).
- **Skinfold Calipers):** Measures the thickness of subcutaneous fat in specific areas of the body.
- **Circumference Measurements (Used in This Calculator):** Uses mathematical formulas with circumference measurements such as waist, neck, hips.
The US Navy method used in this calculator provides a quick and easy estimate, but is not as accurate as other professional methods (DEXA, hydrostatic weighing). Results are a general guide and may vary depending on factors such as a person's overall health, muscle mass, and body type. You should always consult a healthcare professional before making any health-related decisions.