Body Composition

Analyze your body composition with professional body fat percentage and muscle mass calculations. Get detailed insights into your body composition, track changes, and optimize your fitness journey.

Body Fat Analysis
Muscle Mass
Composition Tracking

Body Composition Calculator

Calculate your body fat percentage and analyze your body composition

Calculation Method

Basic Information

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Measurement Methods

Understanding different body composition measurement techniques

US Navy Method

Measurements: Height, waist, neck (+ hips for women)

Accuracy: ±3-4% body fat

Advantages: Simple, no special equipment needed

Best for: General population assessment

Male Formula:
BF% = 495 / (1.0324 - 0.19077 × log(waist - neck) + 0.15456 × log(height)) - 450

YMCA Method

Measurements: Weight and waist circumference

Accuracy: ±4-5% body fat

Advantages: Quick and simple

Best for: Fitness assessments and tracking

Formula:
Uses weight-to-waist ratio with gender-specific constants

Deurenberg Formula

Measurements: BMI, age, and gender

Accuracy: ±3-4% body fat

Advantages: Accounts for age-related changes

Best for: When circumference measurements unavailable

Formula:
BF% = (1.20 × BMI) + (0.23 × age) - (10.8 × gender) - 5.4

Measurement Tips

Timing

Measure at the same time of day, preferably morning after using the bathroom

Waist Measurement

Measure at the narrowest point, usually just above the navel

Tape Position

Keep tape measure level and snug but not tight against skin

Consistency

Use the same method and conditions for tracking changes over time

Body Composition Tracker

Track your body composition changes over time

Log New Measurement

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Measurement History

No measurements logged yet. Start tracking your progress!

Body Composition Insights

Understanding body composition and health implications

Body Fat Percentage Ranges

Men

Essential Fat 2-5%
Athletes 6-13%
Fitness 14-17%
Average 18-24%
Obese 25%+

Women

Essential Fat 10-13%
Athletes 14-20%
Fitness 21-24%
Average 25-31%
Obese 32%+

Lean Body Mass

What is LBM? Everything in your body except fat - muscles, bones, organs, water

Importance: Higher LBM means better metabolism, strength, and health

Typical Ranges:

  • Men: 80-90% of body weight
  • Women: 70-85% of body weight
  • Athletes: Often higher due to muscle mass

Improving LBM: Strength training, adequate protein, progressive overload

Body Composition vs. Weight

Weight alone doesn't indicate health or fitness level
Body composition provides better health insights
Muscle weighs more than fat but takes less space
Focus on fat loss and muscle gain, not just weight loss

Important Considerations

Measurement Accuracy: Home methods have ±3-5% error margin
Individual Variation: Genetics affect fat distribution and muscle mass
Age Factors: Body composition naturally changes with age
Hydration Impact: Water retention affects measurements
Professional Assessment: DEXA, BodPod more accurate than home methods