BFR Calculator
Quick body fat calculation with US Navy and BMI formulas, clean results.
BFR Body Fat Calculator
BFR (Body Fat Ratio) indicates the percentage of body fat in total weight. Supports US Navy and Deurenberg methods.
Measure circumferences while standing relaxed with normal breathing. US Navy formulas are based on inches; cm are converted automatically.
Enter height, weight, and circumferences to auto-calc; Deurenberg requires age and does not use circumferences.
Methodology Details
Developed by the US Navy Research Center. Estimates body fat by measuring specific body circumferences. It better reflects the reality for people with higher muscle mass compared to the BMI method.
An empirical formula based on BMI, age, and sex. Suitable for quick estimates for the general population, but may underestimate the body fat percentage of muscular individuals because it does not consider circumferences.
About This Tool
BFR (Body Fat Ratio) measures the percentage of fat in total body weight and is a key indicator for body composition. This tool offers two mainstream methods: the US Navy circumference method and the Deurenberg BMI formula. Results include body fat percentage, fat mass, and lean mass with reference ranges for a clearer understanding. All calculations run locally for speed and privacy.
Features
- 📏 Two Methods: US Navy circumference and Deurenberg BMI formulas
- ⚡ Instant Calculation: Results update in real time as you type
- ⚖️ Body Composition: Outputs fat mass and lean mass references
- 📊 Visual Ranges: Clear reference bands for body fat levels
- 📱 Responsive Layout: Clean on mobile and desktop
- 🛡️ Privacy First: All calculations run locally