Body Fat Percentage Calculator
Calculate your body fat percentage using waist and neck measurements
About this calculator
This body fat percentage calculator uses the U.S. Navy method to estimate your body fat percentage based on waist and neck measurements. It provides a convenient alternative to expensive body composition tests like DEXA scans or hydrostatic weighing. Understanding your body fat percentage is crucial for fitness goals, health monitoring, and tracking progress during weight loss or muscle building programs. This measurement gives you a more accurate picture of your body composition than weight alone.
How to use
Measure your waist at the narrowest point and your neck just below the Adam's apple using a flexible measuring tape. Enter these measurements along with your height and gender into the calculator. The tool will instantly calculate your estimated body fat percentage using the proven U.S. Navy formula.
Frequently asked questions
How accurate is the U.S. Navy body fat method?
The U.S. Navy method is accurate within 3-4% when measurements are taken correctly, making it reliable for general fitness tracking.
What's considered a healthy body fat percentage?
Healthy ranges vary by gender: men 10-20%, women 16-25%. Athletes typically have lower percentages while still maintaining good health.
How often should I measure my body fat percentage?
Measure monthly or bi-weekly for tracking progress. Daily fluctuations in hydration and bloating can affect waist measurements significantly.