BMI Calculator

The BMI Calculator tool estimates body mass index using weight in kilograms and height in centimeters. It serves individuals performing personal health screening and professionals in clinics, gyms, or wellness programs who require a quick, repeatable metric without manual calculations. It supports consistent inputs, immediate results, and clear output formatting to facilitate trend tracking over time.
Conceptually, BMI is weight divided by height in meters squared. The tool converts height_cm to meters, applies the formula BMI = weight_kg / (height_m * height_m), and rounds to one decimal place. It outputs both the numeric BMI value and the corresponding category to aid interpretation.
Value is in standardization and localization: uses metric units and WHO BMI categories (Underweight, Normal, Overweight, Obese). The differentiator is strict input validation, explicit error handling for invalid data, and a simple, auditable calculation path suitable for health records and reporting.
Core features include required inputs weight_kg and height_cm, outputs bmi_value with formatting to one decimal, and a category label. Optional enhancements describe unit tests, validation rules, and export-ready results for client files.