BMI Calculator
Calculate body mass index from height and weight.
About this tool
BMI is a rough height-to-weight ratio used in many health screenings. This free BMI calculator computes the index from your measurements and shows common category bands. Results are local and private—use them as a starting point, not a diagnosis, and talk to a clinician for personal medical advice.
How to use
- Enter your height using the units shown (cm or ft/in).
- Enter your weight in kg or lb as supported.
- Calculate BMI and view the category range.
- Treat the number as informational and seek professional advice for health decisions.
Frequently asked questions
BMI does not distinguish muscle from fat. Athletes may show a higher BMI without excess fat—context matters.