BMI Calculator
Calculate your Body Mass Index and find out if you are underweight, normal or obese.
| BMI Range | Category |
|---|---|
| 0 – 18.5 | Underweight |
| 18.5 – 25 | Normal weight |
| 25 – 30 | Overweight |
| 30 – 35 | Obese (Class I) |
| 35 – 40 | Obese (Class II) |
How to Use BMI Calculator
- 1
Select your unit system: Metric (kg/cm) or Imperial (lbs/ft/in).
- 2
Enter your height in the appropriate unit.
- 3
Enter your current weight.
- 4
Your BMI and weight category are calculated instantly.
- 5
View the healthy weight range for your height and your position on the BMI scale.
About BMI Calculator
Our free BMI calculator gives you an instant Body Mass Index score along with your weight category — Underweight, Normal, Overweight, or Obese — and a visual position on the WHO BMI scale. Supports both metric (kg/cm) and imperial (lbs/ft/in) units.
Key Features
- Instant BMI Score: Calculates BMI = Weight (kg) / Height (m)² in real time.
- Weight Category: Shows your WHO classification and a visual scale indicator.
- Healthy Weight Range: Displays exactly how much weight to gain or lose to reach normal BMI.
- Metric & Imperial: Switch between kg/cm and lbs/ft/in units.
- Asian BMI Standards: Option to apply lower WHO cutoffs recommended for Asian populations.
Who Is This For?
Adults monitoring their weight status, people on fitness journeys tracking progress, healthcare students learning BMI assessment, and anyone filling out health forms that ask for BMI.
Privacy & Security
Runs 100% in your browser — no signup, no uploads, no data stored.