Apple sells one iPad for every two iPhones

"The Company sold 37.4 million iPhones in the quarter, compared to 35.1 million in the year-ago quarter. Apple also sold 19.5 million iPads during the quarter, compared to 11.8 million in the year-ago quarter. The Company sold just under 4 million Macs, compared to 4 million in the year-ago quarter."

Source:  Press release from Apple, 23rd April 2013

Earlier - Q4 2012 Results