BMI Calculator
Enter your height and weight to see your Body Mass Index (BMI) and what category it falls into, instantly.
Your files are processed locally in your browser. They are not uploaded to our servers.
How to use
- Choose metric or imperial units.
- Enter your height and weight.
- Read your BMI and category below.
What is this tool?
BMI Calculator divides your weight by the square of your height to give you a Body Mass Index score, then shows which standard category — underweight, normal weight, overweight or obese — that score falls into. Everything is calculated live in your browser as you type.
Common uses
- Checking your BMI as a general health indicator
- Tracking BMI changes over time alongside a fitness goal
- Comparing metric and imperial BMI results
- Getting a quick estimate before a doctor's visit
Related tools
FAQ
Is BMI an accurate measure of health?
BMI is a simple screening tool based only on height and weight — it doesn't account for muscle mass, body composition or other factors, so it should be used as a general indicator rather than a diagnosis.
Can I switch between metric and imperial units?
Yes, use the unit toggle to switch between centimeters/kilograms and feet-inches/pounds.
What BMI range is considered normal?
A BMI between 18.5 and 24.9 is generally classified as normal weight.