BMI Calculator

BMI is a single height-and-weight ratio — it does not know how much of your weight is muscle, bone, or fat. Athletic builds with heavy muscle often score in the "overweight" range while being lean, and people with low muscle mass can score "normal" while carrying more body fat than is healthy. Treat the number as one signal, not a diagnosis.

Under 18.5 is labelled underweight, 18.5 to 24.9 normal weight, 25 to 29.9 overweight, and 30 or above obese. These ranges follow the common adult cut-offs.

No. BMI does not distinguish muscle, bone, and fat, so very athletic builds can read high. Use it as a quick check alongside other measurements rather than as a diagnosis.