Body Composition

Body Fat % Estimator

What it is

Body fat percentage is how much of your total weight is fat tissue. This calculator uses the US Navy method: tape measurements at key points to estimate fat mass without any equipment beyond a measuring tape.

Why it matters

Weight and BMI stay silent when you're losing fat and building muscle simultaneously. Body fat % breaks the tie. It shows actual composition change, which is what body transformation is really about.

Tape measure estimates can vary by a few percentage points. For clinical accuracy, use DEXA scanning or hydrostatic weighing. This tool provides general health information, not medical advice.

Height (cm)

Neck (cm) Wrap a tape around your neck just below the Adam's apple. Keep it level and don't suck in.

Waist (cm) at navel

Enter your measurements above