Body Fat Calculator
Body Fat %
Body Fat Percentage Calculator
Estimate body composition using the US Navy method.
Next steps: linked calculators
Your measurements stay in local storage so these tools open with the same profile.
Water Intake
Daily water in litres and glasses from weight and exercise.
Ideal Body Weight
Devine formula ideal weight in kg and lbs.
BMI Calculator
BMI score, WHO standard categories, and healthy weight range.
Body Composition vs. BMI: Why Anthropometric Fat Distribution Dictates Health
Why muscular athletes and sarcopenic seniors are misclassified by Body Mass Index alone, and how waist-to-hip ratio and US Navy body fat calculations provide superior metabolic health screening.
Understanding Body Fat Percentage
Body fat percentage is the total mass of fat divided by total body mass. It is a more accurate indicator of body composition than BMI because it distinguishes between fat mass and lean body mass.
US Navy Method
The US Navy method is a practical way to estimate body fat using simple tape measurements, utilizing differences in circumference measurements based on gender.
FAQ
- Is this method 100% accurate? No, like all field methods, it is an estimate. Clinical methods like DEXA scans are more accurate.
- Why do women have higher essential fat? Women require more essential body fat for reproductive functions.