Body Fat Calculator
Estimate your body fat percentage using multiple methods including US Navy formula, skinfold measurements, and BMI-based calculations for accurate body composition analysis.
Your Body Fat Analysis
Body Composition Analysis:
Essential Fat
Minimum fat needed for basic physical and physiological health
Athletic
Typical for athletes and very fit individuals
Fitness
Good fitness level with visible muscle definition
Average
Typical body fat range for general population
Obese
Higher body fat levels associated with health risks
About
Our Body Fat Calculator uses scientifically validated methods including the US Navy formula, skinfold measurements, and BMI-based estimations to provide accurate body fat percentage calculations for health and fitness planning.
Why Use
Body fat percentage is a more accurate indicator of health and fitness than weight alone. It helps assess disease risk, track fitness progress, and optimize training and nutrition strategies for better body composition.
Features
Multiple calculation methods, gender-specific formulas, detailed body composition breakdown, fat mass and lean mass calculations, and comprehensive health category classifications.
Benefits
Monitor health risks, track fitness progress accurately, optimize workout routines, set realistic goals, and understand your body composition for better health management and athletic performance.
Choose Method
Select from US Navy formula (circumference measurements), skinfold method (requires calipers), or BMI-based estimation based on available tools and accuracy needs.
Take Measurements
Enter your body measurements following the specific guidelines for each method. Ensure measurements are taken consistently and accurately for best results.
Analyze Results
Review your body fat percentage, health category, and body composition breakdown. Use insights to adjust fitness goals and monitor progress over time.
Frequently Asked Questions – Body Fat Calculator
The US Navy method is generally most accurate for home measurements, with error rates of ±3-4%. Skinfold measurements can be very accurate (±2-3%) when performed by trained professionals with quality calipers. BMI-based methods are least accurate but useful for general estimates. Professional methods like DEXA scans (±1-2%) or hydrostatic weighing are most precise.
Men: Essential fat 2-5%, Athletic 6-13%, Fitness 14-17%, Average 18-24%, Obese 25%+. Women: Essential fat 10-13%, Athletic 14-20%, Fitness 21-24%, Average 25-31%, Obese 32%+. Women naturally have higher body fat due to reproductive function and hormonal differences. These ranges may vary slightly between different classification systems.
Neck: Measure just below the larynx (Adam’s apple), keeping tape horizontal. Waist (Men): At navel level, don’t suck in stomach. Waist (Women): At narrowest point, usually just above navel. Hips (Women only): At widest point around hips. Take measurements in the morning, stand straight, breathe normally, and use a flexible measuring tape.
Measure body fat every 2-4 weeks for tracking progress. Daily fluctuations are normal due to hydration, food intake, and hormonal changes. For accurate tracking, measure at the same time of day (preferably morning), under similar conditions, and use the same method consistently. Focus on trends over time rather than individual measurements.
Measurement accuracy can be affected by: hydration levels, food intake, time of day, menstrual cycle (women), muscle pump from exercise, measurement technique, tape tension, and individual body composition variations. For best results, measure consistently under similar conditions, preferably in the morning before eating or exercising.
No, extremely low body fat can be unhealthy. Essential fat is necessary for hormone production, organ protection, and cellular function. Very low body fat (<5% men, <12% women) can cause hormonal disruptions, immune system issues, and reproductive problems. The “fitness” range typically provides the best balance of health and appearance for most people.