With Spotlight, you can find documents, apps and other files on your Mac. And with Spotlight Suggestions, you can also get movie times, weather, sports info and more. In addition to being able to find nearly anything, Spotlight can also do unit conversions. All you need to do is type in the figure you want converted, for example enter '44mph' and it will show the conversion to kilometers. Or, for example you could enter '92kg', which will show the conversion to pounds. You can also convert currency.