Estimate Body Mass Index from height and weight using the standard adult formula. Screening only — not a diagnosis.
Adult BMI = weight (kg) ÷ height (m)². Imperial inputs are converted to metric before the same formula is applied.
BMI does not distinguish muscle from fat. Dense muscle mass can raise BMI without indicating excess body fat.
Children and teens need age- and sex-specific BMI percentiles. This adult-oriented calculator is not a pediatric growth chart.