Estimate your body fat percentage accurately with our easy-to-use Body Fat Calculator. Input your measurements (gender, height, neck, waist, hip) to get a quick assessment of your body composition. Ideal for tracking fitness progress and understanding your health metrics.
Please enter a valid height.
Please enter a valid neck circumference.
Please enter a valid waist circumference.
Please enter a valid hip circumference.
About Body Fat Calculator
Our free body fat calculator uses the U.S. Navy Body Fat Formula to estimate your body fat percentage based on circumference measurements. This method provides a practical alternative to expensive body composition testing and is widely used by military and fitness professionals.
Body fat percentage is a more accurate indicator of health and fitness than BMI alone, as it distinguishes between muscle mass and fat mass, providing better insights for fitness goals and health assessment.
How to Use the Body Fat Calculator
Select Gender: Choose male or female (affects required measurements)
Choose Units: Select imperial (inches) or metric (centimeters)
Measure Height: Enter your height in the selected unit
Measure Neck: Measure neck circumference at the narrowest point
Measure Waist: Measure waist at the narrowest point (males) or at navel level (females)
Measure Hips (Females Only): Measure hips at the widest point
Calculate: Click "Calculate Body Fat" to get your estimated percentage
Body Fat Measurement Tips
Consistent Timing: Measure at the same time of day for consistency
Proper Technique: Keep measuring tape snug but not tight against skin
Relaxed Position: Stand naturally with normal breathing
Multiple Measurements: Take 2-3 measurements and use the average
Track Progress: Monitor changes over time rather than single measurements
Healthy Ranges: Men: 10-20%, Women: 16-25% for fitness levels
Professional Comparison: Compare with DEXA or hydrostatic weighing when possible