BMI Calculator is a free tool for calculating your body mass index (BMI) in seconds from your height and weight. BMI is a common reference value, calculated as weight divided by height squared, that maps to underweight, normal, overweight, or obese categories. The result is calculated instantly along with a label showing which category it falls into. This tool is for general information only and isn't a substitute for medical advice.
How to Use It
- Enter your height in centimeters.
- Enter your weight in kilograms.
- See your BMI value and category instantly.
Use Cases
- General health tracking with a BMI check
- A reference value for weight loss or gain goals
- A quick pre-assessment before a fitness or nutrition program
- Quick calculation out of general curiosity
Frequently Asked Questions
How is BMI calculated?
Using the formula weight (kg) / (height (m) x height (m)).
What are the BMI categories?
Below 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight, and 30 and above is obese.
Is BMI a sufficient health indicator on its own?
No, it doesn't account for factors like muscle mass; use it as a general reference and consult a healthcare professional for a proper assessment.
Is my data saved anywhere?
No, all calculations happen in your browser; nothing is stored.