Body Fat Percentage Calculator

The Navy circumference method is typically within 3–4% of a DEXA scan for most people. It is far more reliable than BMI because it uses your actual waist, neck and hip measurements, but it is an estimate — use it to track the trend over weeks, not as a clinical figure.

Use a flexible tape, relaxed and level. Neck: just below the larynx. Waist: at the navel for men, at the narrowest point for women. Hip (women): at the widest point. Measure on bare skin, do not pull the tape tight, and take each measurement twice.

For men, roughly 14–17% is "fitness" and 6–13% is "athletic". For women, 21–24% is "fitness" and 14–20% is "athletic". Essential fat is about 2–5% for men and 10–13% for women — going below that is unhealthy.

Yes. This is the U.S. Navy body-fat calculator (also called the Navy tape-measure or circumference method). It uses your height, neck and waist — plus hip for women — to estimate body-fat percentage, the same formula the U.S. Navy uses for its fitness standard.

Yes. Alongside your body-fat percentage the calculator returns your fat mass and lean (fat-free) mass in kg or lb, so you can track lean mass and act as a muscle-percentage analyzer over time, not just a single fat number.

BMI cannot tell muscle from fat, so a lean, muscular person can read as "overweight" while someone with low muscle and high visceral fat reads as "normal". Body-fat percentage measures what actually matters for health and physique.