BMI Calculator
Calculate Body Mass Index from height and weight.
Your BMI
β
BMI Categories
| Category | BMI range | Health risk |
|---|---|---|
| Underweight | < 18.5 | Possible malnutrition |
| Normal weight | 18.5 β 24.9 | Low risk |
| Overweight | 25 β 29.9 | Increased risk |
| Obese (Class I) | 30 β 34.9 | High risk |
| Obese (Class II) | 35 β 39.9 | Very high risk |
| Obese (Class III) | ≥ 40 | Extremely high risk |
About this tool
Processing happens directly in your browser. No files are uploaded to the server.
The BMI Calculator computes your Body Mass Index from height and weight. It supports both metric (kg/cm) and imperial (lbs/ft+in) units and shows your BMI category β Underweight, Normal, Overweight or Obese β with a visual indicator.
How to use
- 1 Choose Metric or Imperial units.
- 2 Enter your weight and height.
- 3 Your BMI and category appear immediately.
- 4 Check the reference table below for BMI category ranges.
Frequently asked questions
What is a healthy BMI?
A BMI of 18.5β24.9 is considered normal weight for most adults.
Does BMI apply to everyone?
BMI is a general screening tool. It may not accurately reflect body fat for athletes, elderly people or children.
Is metric or imperial more accurate?
Both give identical results β the formula is the same, only the units differ.
Is my data stored?
No. The calculation runs entirely in your browser.