BMI calculator
Body mass index and the healthy weight range.
Calculate your BMI.
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BMI calculator: what it is for
The BMI calculator divides your weight by your height squared and shows the category: underweight, normal, overweight or obese.
It also shows the weight range considered healthy for your height. BMI is a reference and doesn't replace a medical evaluation.
How to use
- Type your weight in kilograms.
- Type your height in meters or centimeters.
- See your BMI and category.
When to use it
- Keep track of your health.
- Set weight goals.
- Curiosity before a doctor's visit.
Frequently asked questions
Does BMI work for everyone?
No. It doesn't tell muscle from fat and doesn't apply to children, pregnant women and athletes. Use it as a reference and talk to a health professional.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 tools are free and run right in your browser.