Public tool
BMI calculator
Calculate body mass index for an adult and see a neutral informational category. The calculation runs only in this browser.
Calculation details
Formula and limits
BMI: weight (kg) × 10,000 ÷ height (cm)². The value is rounded to 0.1. Based on the displayed value, the category is below 18.5; 18.5–24.9; 25.0–29.9; or 30.0 and above.
BMI is a limited screening measure for adults, not a diagnosis. It does not assess body composition, health status, or a need for treatment.
Frequently asked questions
Why is the category based on the rounded value?
That keeps the displayed number and the neutral informational category consistent with one another.
Is BMI suitable for everyone?
No. This simplified measure has limits and this form is intended for adults only.
Is the calculation saved?
No. Your height and weight are not stored or sent to a server.
Important
This result is for information only, does not replace medical care, and is not intended for people under 18, during pregnancy or breastfeeding, with eating disorders, health conditions, or medicines that affect weight.