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Body Fat Calculator

Estimate your body fat percentage using multiple proven methods including US Navy, YMCA, and skinfold measurements. Get accurate body composition analysis.

Body Fat Calculation

US Navy
YMCA
Skinfold
30 years
170 cm
70 kg

Body Fat Results

Body Fat Percentage: 18.5%
Body Fat Category: Fitness
Fitness Level
Fat Mass: 13.0 kg
Lean Body Mass: 57.0 kg
BMI: 24.2
Ideal Body Fat Range: 16-24%

Health Assessment

Your body fat percentage is in the fitness range, indicating good health and fitness level.

About Body Fat Percentage

Body fat percentage is the proportion of fat to total body weight. Unlike BMI, which doesn't distinguish between muscle and fat, body fat percentage provides a more accurate assessment of body composition and health status.

Body Fat Categories (Women/Men):

Essential Fat: 10-13% / 2-5%

Athletes: 14-20% / 6-13%

Fitness: 21-24% / 14-17%

Average: 25-31% / 18-24%

Obese: 32%+ / 25%+

Measurement methods comparison:

  1. US Navy Method: Uses circumference measurements, convenient and fairly accurate
  2. YMCA Method: Simple waist-based calculation, good for general estimation
  3. Skinfold Method: Uses calipers to measure subcutaneous fat, requires proper technique
  4. DEXA Scan: Most accurate but requires specialized equipment
  5. Bioelectrical Impedance: Common in scales, accuracy varies with hydration

Health Implications

Too Low: Can affect hormone production, immune function, and temperature regulation.

Optimal Range: Associated with good health, energy levels, and disease prevention.

Too High: Increased risk of cardiovascular disease, diabetes, and other health issues.

Remember that body fat percentage is just one indicator of health. Consider muscle mass, fitness level, and overall health markers for a complete assessment.

Calculation Formulas

US Navy Method (Women):

BF% = 495 / (1.29579 - 0.35004 × log10(waist + hip - neck) + 0.22100 × log10(height)) - 450

US Navy Method (Men):

BF% = 495 / (1.0324 - 0.19077 × log10(waist - neck) + 0.15456 × log10(height)) - 450

YMCA Method:

BF% = (4.15 × waist - 0.082 × weight - 76.76) for men BF% = (4.15 × waist - 0.082 × weight - 98.42) for women

Body Composition

Fat Mass = Weight × (BF% / 100) Lean Mass = Weight - Fat Mass

Healthy Body Fat Tips

• Combine cardio and strength training

• Maintain a balanced, protein-rich diet

• Stay hydrated and get adequate sleep

• Monitor progress with multiple methods

• Focus on overall health, not just numbers