Use Cases

Body Mass Index Calculator (BMI Calculator) is used in Health tracking for person when they need to know whethere they are in Under Weight, Normal weight, Over Weight, or Obese. It's also being used by Doctor, Dieticians, & Professional fitness trainer, as a screening tool for identifying weight related risk & for intial assesment for & before prescribing diet plans or exercise or medical interventions.
Despite of all of these major use cases BMI does not identify body fat directly & it may can missunderstood as mascullar individuals or may underestimate elderly people. To overcomes this sometimes it is paired with other ratio measurement like body fat percentage % or waist to hip ratio, etc.