Yosemite Spotlight Calculator suddenly stopped working I use Spotlight's Calculator feature occasionally, but I've noticed that it has stopped working recently.  Instead I get a  "No Results" message:



I've verified that Calculator is enabled in Spotlight System Preferences.  Restarting the computer does not help.  I also tried disabling and re-enabling the Calculator setting in Spotlight.

Any other ideas?
Delete the spotlight preferences file:

~/Library/Preferences/com.apple.Spotlight.plist


And then reboot. I was having the same problem and that fixed it for me.