Body Fat Calculator
Calculate your body fat percentage using the U.S. Navy Method and BMI Method. Supports metric and imperial units.
How to use the body fat calculator
1. Select your unit system
Choose Metric (cm, kg) or Imperial (inches, lbs) depending on what's easiest for you to measure.
2. Enter your details
Input your age, height, weight, waist circumference, and neck circumference. If you selected Female, you'll also enter your hip circumference.
3. Click Calculate
Get your body fat percentage instantly using both the U.S. Navy Method and the BMI Method, along with your body fat category.
Why choose CalcPro's body fat calculator?
Accurate results: uses two proven methods for reliable calculations. Easy to use: a simple interface with clear instructions. Free and accessible: no sign-up or download required. Supports both units: works with metric and imperial measurements.
What is body fat percentage?
Body fat percentage is the proportion of fat in your body compared to your total weight. It's a key indicator of overall health and fitness. While some body fat is essential for vital functions, excess fat can contribute to health issues like obesity, heart disease, and diabetes. Tracking your body fat percentage over time helps you monitor fitness progress and make informed decisions about your health.
How body fat percentage is calculated
U.S. Navy Method
This method uses waist, neck, and (for women) hip circumference measurements to estimate body fat percentage. It's widely regarded as one of the more accurate methods available without specialized equipment. Learn more about the U.S. Navy Method on Wikipedia.
BMI Method
This method estimates body fat percentage using your Body Mass Index along with age and gender. It's simpler to calculate but still provides a useful estimate for most people. Read more about BMI from the CDC.
Healthy body fat percentage ranges
| Category | 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%+ |
Body fat percentage: frequently asked questions
What is a healthy body fat percentage?
For men, 14-17% is generally considered fit, and 18-24% is average. For women, 21-24% is fit, and 25-31% is average. Essential fat levels (below these ranges) are the minimum needed for basic health.
How often should I measure my body fat percentage?
Once every 2-4 weeks is usually enough to track meaningful changes, since body fat percentage doesn't fluctuate significantly day to day.
Can I use this calculator for children?
No. Both the Navy Method and BMI-based body fat formulas are calibrated for adults and aren't accurate for children or teenagers still growing.
How often should I check my BMI?
Checking alongside your body fat percentage every few weeks is reasonable, though BMI alone doesn't distinguish between fat and muscle mass.
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Learn more about body fat and health
Healthline: Understanding Body Fat Percentage
WebMD: Tips for Maintaining a Healthy Body Fat Percentage
Mayo Clinic: Fitness and Nutrition Guide