Your Windows OS comes with an in-built calculator. Turn on your PC or whatever device you’re using, such as a tablet or laptop. There is no rocket science involved on how to do a square root on a windows calculator. How to square root on the Windows calculator With all these modes, the square root is a simple task. The four modes, including standard, scientific, programmer, and graphical, allow you to execute dozens of complex functions. But, to your surprise, the Microsoft windows calculator is a lot more helpful than you would think. You would think of the windows calculator as a useless thing that can’t perform many operations besides ordinary addition, subtraction, or division. What can you do with the Windows calculator? Windows calculator square root shortcut.How to square root on the Windows calculator.What can you do with the Windows calculator?.