Basic calculator for quick calculations
A straightforward calculator for everyday arithmetic, with keyboard support so you can type rather than click. It handles the four basic operations along with percentages and sign changes.
It is deliberately simple. For quick sums, a calculator that opens instantly and takes keyboard input is faster than anything with more features buried in menus.
Yes. Number keys, the four operators, Enter for equals, and Escape to clear all work, which is considerably faster than clicking for anything more than a single sum.
Divide rather than subtract. To remove twenty per cent that has been added, divide by 1.2. Subtracting twenty per cent instead gives a different and incorrect answer.
The calculator evaluates as you enter, which suits sequential arithmetic. For expressions where operator precedence matters, enter the bracketed part first and use the result.