What to select
Enter an adult weight in kilograms and height in centimetres.
BMI Calculator
Calculate adult body mass index and view the standard informational weight category.
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How this calculator works
Calculate body mass index for an adult using metric weight and height, then compare the result with standard screening ranges.
Weight in kilograms is divided by height in metres squared. The category is descriptive and deliberately avoids presenting a screening result as a diagnosis.
Formula
BMI = weight (kg) ÷ height² (m)
Example
An adult who weighs 70 kg and is 175 cm tall has a BMI of approximately 22.86, within the standard screening range.
Important: BMI does not account for age, pregnancy, muscle mass or individual health circumstances. Ask a qualified healthcare professional for personal advice.
Supported formats
Arithmetic expressions, percentages, powers, square roots, numbers, calendar dates, clock times and common measurement units.
Limits and safety
Standard calculations are limited to 256 characters. Results use JavaScript floating-point arithmetic; verify financial, legal or time-sensitive decisions independently.
Frequently asked questions
Are my calculation values saved?
No. Calculator inputs and results stay in this browser tab.
Can I rely on these results professionally?
Use them as general estimates. Lenders, billing systems, calendars and rounding rules may produce different results.