The default Windows calculator can do many useful things. Say if you want to quickly convert temperature readings from Fahrenheit to Celsius or Kelvin or say convert time values from days, hours, weeks to seconds, milliseconds and so on, it is possible to do this quickly.
To access this conversion features in Windows calculator :
1. Open Calculator (either from All Programs > Accessories > Calculator or type “calc” in search box that shows up on clicking Windows orb).
2. Select View > Unit conversion or hit Ctrl + U.
3. The right pane now will show up where you can do all kinds of conversion quickly without remembering much. 🙂