Body Fat Calculator
Body fat percentage using the US Navy method.
years
cm
cm
cm
Formula: US Navy circumference method
Worth Knowing
The Navy method estimates body fat from a handful of circumference measurements rather than directly measuring fat tissue, which is what makes it fast and accessible but also less precise than clinical methods like DEXA scanning or hydrostatic weighing — expect it to be accurate to within a few percentage points for most people, and less reliable for those with atypical body proportions (very muscular or very tall/short individuals in particular). Measuring at the same time of day, in the same conditions, and with consistent tape placement matters more for tracking change over time than any single reading does in isolation.
How to Use
- Enter Gender into the first field of the Body Fat Calculator.
- Fill in the rest: Age, Waist, Neck, Hip (female only), Height.
- Your result appears instantly as you type — there's no submit button or page reload.
Formula
US Navy circumference method