BMI Calculator
Calculate BMI
Methodology & standardsRuns on your device
Inputs
Results update liveBMI
22.9
Normal weight
Interpretation
How BMI Calculation works
The BMI Calculator computes your Body Mass Index using your height and weight. BMI is a widely-used screening tool that categorizes weight status into underweight, normal, overweight, and obese ranges. It supports both metric (kg/cm) and imperial (lbs/inches) measurement systems.
Example
Key features
A realistic scenario showing how the calculation guides a practical decision.
Formula
BMI = Weight (kg) / Height (m)\u00b2 \u2014 or \u2014 BMI = (Weight (lbs) \u00d7 703) / Height (inches)\u00b2
- Supports both metric and imperial units
- Instant BMI category classification with color coding
- Based on WHO standard BMI ranges
- Easy unit switching for international users
Watch out
Common mistakes
- BMI is a useful screening tool but does not account for muscle mass, bone density, or body composition. Athletes with high muscle mass may have elevated BMI readings despite being in excellent health.