A reference range, not a personal ideal
A range avoids implying that one exact weight suits everyone of the same height. Muscle mass, fat distribution, age, health, and individual history still matter when interpreting it.
How the reference range is calculated
The BMI equation is rearranged to calculate weight at BMI 18.5 and 24.9. Using 24.9 is a convenient rounded convention; the standard adult category extends up to, but does not include, BMI 25.
How to use this calculator
- 1Select units and enter your height.
- 2Calculate the adult reference range in the selected unit; switch units to compare.
- 3Use the range as context alongside body composition and professional guidance when needed.
Understanding your result
The endpoints describe a BMI convention, not goals you are expected to reach. A weight outside the range is not a diagnosis, and being inside it is not a guarantee of health.
Assumptions & limitations
- This range is not appropriate for pregnancy, children, or teens.
- Height alone cannot account for muscle, disability, clinical history, or ethnic differences in risk.
Frequently asked questions
Why does this calculator show a range?+
A single number would imply unjustified precision. Even the displayed range is only a general BMI-based reference, not an individualized target.
Why does the calculation not ask for sex?+
The standard adult BMI reference used here depends on height and weight, not sex. Other historical weight formulas use different assumptions.
Should I aim for the middle of the range?+
Not automatically. The midpoint has no special status as your healthiest or most suitable weight.
Is this the same as the Devine formula?+
No. This tool reverses the BMI equation. It does not use the Devine formula or suggest a medication-dosing weight.
