Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy Method
Understanding Your Body Fat Percentage
Body fat percentage is a measure of fitness level, as it is the only body measurement which directly calculates a person's relative body composition without regard to height or weight. Unlike Body Mass Index (BMI), which only uses height and weight, body fat percentage distinguishes between muscle mass and fat mass.
The U.S. Navy Method Explained
This calculator utilizes the U.S. Navy Body Fat formula, which is considered one of the most accurate "tape measure" methods for estimating body composition. It requires specific measurements of the neck and waist for men, with the addition of hip measurements for women, to estimate the volume of the body and the distribution of fat.
Ideal Body Fat Categories
Body fat requirements vary based on gender and age. According to the American Council on Exercise (ACE), the ranges are generally categorized as follows:
- Essential Fat: Men (2-5%), Women (10-13%)
- Athletes: Men (6-13%), Women (14-20%)
- Fitness: Men (14-17%), Women (21-24%)
- Acceptable: Men (18-24%), Women (25-31%)
- Obesity: Men (25%+), Women (32%+)
How to Get Accurate Measurements
For the most accurate results, follow these measurement tips:
- Waist: Measure at the narrowest point for women and at the navel level for men.
- Neck: Measure just below the larynx, sloping slightly downward to the front.
- Hips (Women only): Measure at the widest point of the buttocks.
- Consistency: Measure in the morning before eating or exercising for the most consistent day-to-day data.