Calculate your Body Mass Index quickly using height and weight, and check your current weight health status.
BMI = weight in kg ÷ (height in m)². The calculator accepts pounds and inches and converts them, so you do not need to do the math by hand.
BMI is a quick, free screening tool used by clinicians to flag weight categories linked to health risk. It needs no scan or blood test.
Treating BMI as body fat. It ignores muscle, bone and where fat sits. An athlete can read "overweight" with low body fat, so use it as a screen, not a verdict — see the body fat and waist tools for more detail.
What is a healthy BMI? For most adults 18.5–24.9 is the normal range; below or above shifts risk.
Does BMI work for everyone? It is less reliable for children, older adults and very muscular people, who need age- or composition-based measures.