Calculate BMI prime relative to the healthy range.
Body composition for BMI Prime derives BMI from weight and height and maps it to a standard category, with the healthy-range weight at the bottom of the normal band. BMI is a screening tool, not a diagnosis, but it remains the fastest population-level signal.
BMI Prime
BMI = weight / height^2; healthy weight = 18.5 x height^2
These are educational and reference calculations only. They are not a diagnosis, not a substitute for measurement or laboratory testing, and must not be used to start, stop, time or change any medication or treatment. Reference thresholds differ between national guidelines and do not account for your individual clinical context. Discuss any result that concerns you with a qualified healthcare professional, and seek urgent medical attention for acute symptoms rather than relying on a calculator.
BMI = weight / height^2; healthy weight = 18.5 x height^2 Body composition for BMI Prime derives BMI from weight and height and maps it to a standard category, with the healthy-range weight at the bottom of the normal band.
BMI is a screening tool, not a diagnosis, but it remains the fastest population-level signal.
This calculator takes 3 inputs: Height, Weight, Age. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.