Windows PowerToys are a series of free tools developed by Microsoft, that improve lots of features originally included in the operating system, like the calculator for example, that are not supported by Microsoft.
PowerToy Calc is a complete revision of the popular Windows calculator that includes many improvements and options, that should have already been included in the original application designed for Windows.
A super-version of the Windows calculator
This tool can work in three different modes: numerical calculator (that is basically the same as the original Windows calculator, with the exception that it includes an operation history), history mode (where we can control all the work we have done with the calculator) and a graphic mode, that will allow us to write complete operations so they are then solved or represented on a chart.
Furthermore, PowerToy Calc includes a complete length, temperature, weight and speed converter, which is sure to solve any problem quickly.