Body Fat Percentage Calculator

The model analyzes visual markers correlated with body fat percentage — muscle striation and definition, fat distribution patterns, and overall body shape — learned from a large training set of photos with known body fat measurements (such as DEXA scans), then returns an estimated percentage range.

Wear fitted or minimal clothing, use even lighting, stand in a relaxed neutral pose, and photograph your full body from the front for the most consistent estimate.

Photo-based body fat estimation typically has a margin of error of roughly ±3–5% compared to clinical methods like DEXA scans. Lighting, pose, clothing, and camera angle all affect accuracy. Use this tool to track relative trends over time rather than as a precise clinical measurement, and consult a healthcare professional for medical-grade body composition analysis.

Body fat percentage became a mainstream fitness benchmark in the mid-20th century as researchers looked for ways to measure body composition beyond simple weight or BMI, neither of which distinguishes muscle from fat. Two people at the same height and weight can have very different body fat percentages depending on how much lean mass they carry — which is why trainers and physique coaches have favored it as a more meaningful number for decades.

Here are the general reference ranges commonly cited by the American Council on Exercise:

These are general population reference points, not personal targets — a healthy range varies with age, genetics, and individual health history, and "essential fat" levels exist because your body needs some fat for hormonal and organ function, not zero.