BMI Calculator

What BMI actually measures

Body Mass Index is weight divided by height squared. It's a quick, widely used screening number — not a diagnosis — that sorts into four general bands: underweight, normal, overweight, and obesity.

It doesn't account for muscle mass, bone density, or body composition, so an athlete and a sedentary person can land on the same number for very different reasons. Treat it as a starting point, not a verdict, and talk to a doctor for anything more specific.