BMI Checker
Calculate your Body Mass Index
weightNormalOver
weightObese IObese II+
About the BMI Checker
The BMI Checker calculates your Body Mass Index from height and weight, in either metric (kg/cm) or imperial (lb/in) units, and shows where your result falls on the standard weight category scale from underweight to obese.
How to Calculate Your BMI
- Choose Metric or Imperial units.
- Enter your height and weight.
- Click Calculate BMI.
- See your BMI value and where it falls on the weight category scale.
Key Features
- Metric and Imperial unit support
- Visual scale showing your result at a glance
- Standard weight category reference ranges
- Instant, real-time calculation
FAQ
What formula is used to calculate BMI?
BMI is calculated as weight in kilograms divided by height in meters squared, converted automatically if you use imperial units.
Is BMI an exact measure of health?
No, BMI is a general screening indicator and doesn't account for muscle mass, body composition, or individual differences — it's a starting point, not a diagnosis.
What are the standard BMI categories?
Underweight (below 18.5), Normal (18.5–24.9), Overweight (25.0–29.9), Obese Class I (30.0–34.9), and Obese Class II+ (35.0 and above).
Is my information stored anywhere?
No, the calculation happens entirely in your browser.