BMI Builder

BMI Builder calculates BMI from height and weight using metric or imperial units. It normalizes inputs to kilograms and meters, then applies the standard BMI formula to produce a numeric BMI value and a category. This tool is suitable for individuals tracking weight, clinicians performing quick screenings, and trainers seeking repeatable results. It does not diagnose conditions but provides a screening metric and consistent interpretation to facilitate discussion and decision making.

Conceptually, BMI is a ratio of body mass to height squared. The calculator supports metric (cm/kg) and imperial (ft/in, lb) inputs, converts them internally, and outputs bmi_value with unit kg/m^2 and a categorical label (Underweight, Normal, Overweight, Obesity). Optional inputs such as age and sex can be used to contextually annotate results when reference data is available. Advanced features include rounding control, unit synonyms, and flags for implausible values to aid integration with health systems. The tool emphasizes deterministic results and interoperability, enabling easy export to JSON, CSV, or dashboards for reporting and monitoring. Typical use cases include self-monitoring, intake screening, and teaching BMI concepts in educational settings.