Body Fat Calculator

Calculate body fat percentage & lean body mass

Body Fat Calculator helps you estimate body fat percentage and lean body mass using simple measurements. More accurate than BMI alone, body fat percentage is the key metric for fitness, health, and body composition assessment.

BMI doesn't tell the whole story - two people with same BMI can have very different body fat percentages. Our calculator uses proven formulas (US Navy method) to estimate body fat from waist, neck, and hip measurements.

**Key Features:**
- Calculate body fat percentage
- Lean body mass calculation
- Fat mass calculation
- US Navy method (most accurate for home use)
- Support for male and female calculations
- Body fat category classification
- Ideal body fat range
- Support for metric and imperial units
- Clean and easy interface
- Works offline - no internet needed
- Share body composition with trainer or doctor
- No registration or login required
- Remove ads with one-time purchase

**Perfect For:**
- Fitness and body transformation tracking
- Gym and personal training
- Weight loss monitoring (fat loss vs muscle loss)
- Bodybuilding and physique competitions
- Sports performance optimization
- Health assessments
- Medical weight management
- Body composition analysis

**Body Fat Categories:**

**Men:**
- **Essential fat:** 2-5% (athletes, bodybuilders)
- **Athletic:** 6-13% (fit, muscular)
- **Fitness:** 14-17% (healthy, active)
- **Average:** 18-24% (normal)
- **Obese:** 25%+ (health risks)

**Women:**
- **Essential fat:** 10-13% (athletes)
- **Athletic:** 14-20% (fit, toned)
- **Fitness:** 21-24% (healthy, active)
- **Average:** 25-31% (normal)
- **Obese:** 32%+ (health risks)

**Example - Male:**
Height: 180 cm
Waist: 85 cm
Neck: 38 cm
Body fat %: ~15% (Fitness category)
Weight: 80 kg
Fat mass: 12 kg
Lean body mass: 68 kg

**Why Body Fat % Matters:**
- High body fat = increased risk of heart disease, diabetes, hypertension
- Low body fat = better insulin sensitivity, cardiovascular health
- Lean body mass = muscle, bones, organs (higher = better metabolism)

Track body fat monthly, not daily (water retention causes fluctuations). Focus on losing fat while maintaining muscle through strength training and protein-rich diet.

Download Body Fat Calculator and track real fitness progress!