A couple of weeks ago, my coworker Sandra was using the Windows 10 calculator like usual. However, she decided to click the menu in the upper left corner, and was amazed at all the options she never knew about. I too was suitably amazed, and thought this would make a great tip… here’s just a sampling of what it can do…
To launch the calculator, click the Windows icon in the lower-left corner of your screen and select the Calculator option:

The calculator will likely come up in standard mode, but click the options menu in the upper-left corner:

As you can see, there are a number of other calculation options above and beyond Standard:

For instance, Date Calculation will give you the difference between two dates (a frequent requirement in business processes):

Need to get a currency conversion based on up-to-date rates? Use the Currency calculator option:

Need to know how many minutes are in a particular number of days? Here you go:

Definitely check this out, as it can help you avoid the time spent searching for sites for currency conversions, measurement conversions, and so on…