Chromebook's browser-based operating system may be focused on the web, but its built-in app launcher has a few tricks up its sleeve -- including performing calculations and conversions without ever opening up a web page.
We've covered how Google already does this from the search bar, and OS X's Spotlight has the same shortcuts. However, you may not have realised that your Chromebook does the same thing: just type in a calculation or conversion, and it will give you an answer right above the suggested searches. Check out the link for other short Chromebook tips.
15 Time-Saving Chromebook Tips [OMG! Chrome!]