BFR Calculator
All-in-one body fat %, fat mass, and lean mass calculator.
Switch methods to compare scenarios
Hip not required for male
Measurement Guide
- Waist: Male at navel, Female at narrowest part
- Neck: Below larynx (narrowest part)
Reference ranges: Age 10-120 years, Height 100-230 cm, Weight 30-250 kg
📊
Fill in details to see body fat and lean mass
Formula
US Navy Body Density Method (Metric): Calculates Body Density (D) first, then uses Siri equation (%BF = 495/D - 450). More accurate than linear approximation.
Body Fat Ranges
| Category | % |
|---|---|
Essential | < 6 |
Athlete | 6 - 13.9 |
Fitness | 14 - 17.9 |
Average | 18 - 24.9 |
Obese | ≥ 25 |
Tips
Navy method is sensitive to tape measurements; BMI method is quick but less accurate for different body types.
Navy Tape Method
About This Tool
This tool provides both the Navy tape method and BMI formula to estimate body fat percentage. Enter gender, age, height, weight, and measurements to calculate body fat %, fat mass, and lean mass, plus category guidance for fitness planning.
Features
- 📏 Two Methods: Navy tape + BMI formula
- 📊 Body Fat %: Instant percentage output
- ⚖️ Fat & Lean Mass: Shows fat mass and lean mass
- 🏷️ Category Ranges: Gender-based body fat ranges
- 📋 One-click Copy: Copy calculation summary
- 📱 Responsive Design: Works on mobile and desktop