Calculator is a software calculator included in all versions of Windows

When Calculator runs in standard mode, it resembles a four-function calculator. More advanced functions are available in scientific mode, including logarithms, numerical base conversions, some logical operators, operator precedence, radian, degree and radians support as well as simple single-variable statistical functions. Separate programmer, statistics, unit conversion, date calculation and worksheets modes were also added to help different types of users solving specific tasks.

To launch Calculator from the Active@ Boot Disk shell, click Start > Utilities > Calculator