BMI Calculator
Calculate Body Mass Index and understand your weight category.
Your Measurements
Enter your weight and height to calculate BMI
WHO BMI Classification
| BMI Range | Category |
|---|---|
| < 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25.0 – 29.9 | Overweight |
| 30.0 – 34.9 | Obese (Class I) |
| 35.0 – 39.9 | Obese (Class II) |
| ≥ 40.0 | Obese (Class III) |
Medical disclaimer: BMI is a screening tool, not a diagnostic measure. It does not account for muscle mass, bone density, age, sex, or ethnicity. Consult a qualified healthcare professional for personalised health advice.
Calculate your Body Mass Index (BMI) instantly in metric or imperial units. Get a color-coded result, WHO classification, and an easy-to-read gauge showing exactly where your BMI falls — no sign-up required.
Key Features
Metric and imperial modes
Enter weight in kg or lb and height in cm or ft/in — units convert in real time.
Color-coded gauge
A gradient gauge bar with a needle shows your BMI position across all WHO categories at a glance.
WHO classification table
All six WHO BMI categories are displayed with your current category highlighted.
Equivalent display
When using metric, your equivalent imperial measurements are shown alongside, and vice versa.
How to Use
- 1Select Metric or Imperial unit mode.
- 2Enter your weight and height.
- 3Your BMI and category appear instantly below the inputs.
- 4Check the WHO table to see where you fall and what it means.