Calculate your body fat percentage using multiple scientific methods with advanced health education, interactive charts, and personalized recommendations
Choose your preferred calculation method and enter your measurements for accurate body fat analysis with health insights
Most accurate method using circumference measurements
Best for: Most people, validated by US NavyQuick estimation based on height, weight, age, and gender
Best for: Quick estimates, general populationPrecise method using skinfold caliper measurements
Best for: Athletes, requires calipersEnter your measurements to see detailed body fat analysis, health insights, and personalized recommendations
Everything you need to know about body fat percentage and your health
Body fat percentage represents the proportion of your total body weight that consists of fat tissue. Different methods use various measurements like circumferences, skinfolds, or statistical correlations to estimate this percentage.
Body fat percentage is a better health indicator than weight alone. It distinguishes between fat mass and lean mass, helping assess cardiovascular health, hormone production, and overall wellness risks.
Athletes typically have lower body fat percentages due to higher muscle mass and training. Understanding your body fat helps create appropriate training and nutrition strategies for your fitness goals.
Your health data is stored locally on your device using browser storage. No information is transmitted to external servers. You maintain complete control over your data and can clear it anytime.
Understanding the strengths and limitations of each body fat measurement method
Developed by the US Navy, this method uses circumference measurements. Most accessible and accurate method without specialized equipment.
Uses skinfold calipers to measure subcutaneous fat thickness. More accurate when performed by trained professionals with proper technique.
Estimates body fat based on BMI, age, and gender using statistical correlations. Quick but less accurate for muscular individuals.
Common questions about body fat measurement and interpretation
The Navy method is recommended for most people as it's accurate and only requires a measuring tape. Use the skinfold method if you have calipers and proper technique. BMI method is best for quick estimates.
Measure once per week at most. Body fat changes slowly (0.5-1% per month), so daily measurements aren't meaningful and can be discouraging. Focus on trends over 4-6 week periods.
For men: 10-20% (athletes 6-13%). For women: 16-25% (athletes 14-20%). Essential fat is ~3% for men and ~12% for women. These ranges support optimal health and hormone function.
Common causes include: different measuring technique, time of day, hydration status, recent meals, or clothing. Measure consistently at the same time under similar conditions for best results.
Yes, especially for beginners or those returning to training. This is called "body recomposition." Focus on strength training, adequate protein intake, and a moderate caloric deficit.
Navy method: ±3-4%, Skinfold: ±3-5%, BMI method: ±5-7%. For comparison, DEXA scans (gold standard) are ±1-2% accurate. These are estimates, not diagnostic tools.
Use these complementary tools for a comprehensive body composition analysis
Calculate your Body Mass Index and compare with body fat percentage for a complete health assessment and screening.
Calculate BMICalculate your muscle mass and fat-free mass for complete body composition analysis and fitness planning.
Calculate LBMCalculate your daily calorie needs to create an effective fat loss or muscle gain plan based on your goals.
Calculate TDEE