Deriving Weight from BMI

This ideal BMI weight calculator inverts the BMI formula — weight = BMI × height² — to find the weight that lands you at each classification boundary. For a given height, healthy weight spans the BMI band 18.5 to 24.9, with 21.7 marking the low-risk midpoint.

Reading the Thresholds

The overweight line (BMI 25) and obese line (BMI 30) mark where epidemiological risk rises in population data. The range between them and the healthy band is where most adults should aim — and where your clinician will expect to see you.

Limitations

BMI is a screening tool, not a body-composition measure. Muscular builds, pregnancy, and some ethnicities shift the interpretation; use this for general planning and discuss specifics with a healthcare provider.