BMI Calculator

BMI Calculator with Health Assessment

Calculate your Body Mass Index (BMI) and get an instant health assessment with our free online tool. Enter your height and weight to see which category you fall into — underweight, normal, overweight, or obese — along with helpful context about what your number means. All processing happens in your browser for complete privacy.

• Calculate BMI using both metric and imperial units
• Instant health category classification (underweight, normal, overweight, obese)
• Visual BMI scale with your position clearly marked
• Support for adult and teen BMI interpretations
• Helpful context about each BMI category and associated health considerations
• Quick unit switching between kg/cm and lbs/ft
• All calculations run locally — no data leaves your browser

How to Use the BMI Calculator

1. 1

   Choose your unit system

   Select metric (kg, cm) or imperial (lbs, ft/in) units for your measurements.

2. 2

   Enter your height

   Input your height in the selected unit system.

3. 3

   Enter your weight

   Input your current weight in the selected unit system.

4. 4

   View your BMI result

   See your BMI value, health category, and a visual representation on the BMI scale.

Frequently Asked Questions

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