Google Now Has A Tip Calculator In SearchBy: Chris Crum - October 14, 2013
Google revealed in a Google+ post on Friday that it has a tip calculator tool that you can access when you enter a question about what a tip should be on a bill of a certain amount.
It also works if you enter something like “how much should i tip on a 25 dollar bill”.
You can also bring the tool up if you simply search for “tip calculator”.
Pretty convenient.[h/t: Google Operating System]