How to use the BMI Calculator
Switch between metric (kg and cm) and imperial (lbs and feet/inches) using the toggle. Enter your weight and height and your BMI appears instantly with a color-coded category label — underweight, normal, overweight, or obese.
The BMI scale reference at the bottom shows where your result falls relative to all four categories at a glance.
When to check your BMI
BMI is a quick, no-equipment screening tool. Use it when:
- →Starting a fitness journey and wanting a baseline measurement
- →Tracking progress over weeks or months
- →Filling in health forms that ask for BMI
- →Understanding health risk context before a doctor's appointment