What is the BMI Calculator?
The BMI Calculator is a free online tool that calculates your Body Mass Index (BMI). BMI is a simple measure that uses your height and weight to estimate whether youโre at a healthy weight.
How to Calculate BMI
- Select your preferred unit system (metric or imperial)
- Enter your height
- Enter your weight
- Click โCalculate BMIโ
- View your BMI result and category
BMI Categories
| BMI Range | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 โ 24.9 | Normal weight |
| 25.0 โ 29.9 | Overweight |
| 30.0 and above | Obese |
Key Features
- Dual Units โ Metric and imperial support
- Instant Results โ Calculate BMI immediately
- Category Display โ See your weight category
- 100% Private โ All calculations happen in your browser
- Mobile Friendly โ Works on all devices
Limitations of BMI
While BMI is a useful screening tool, it has limitations:
- Doesnโt distinguish between muscle and fat
- May not be accurate for athletes
- Doesnโt account for age, sex, or ethnicity
- Should be used alongside other health measures