For those of you who may still be looking for a really quick and efficient way of figuring out 1YPEG, I have found a simple elegant solution that works for me.
E trade has all the needed numbers already figured out for you in non-GAAP numbers. The PE is on the snapshot page. Simply click on the earnings page and quarterly earnings are neatly shown in a bar graph going back 4 years, with the previous 4 quarters already totaled for you.
All of the numbers coincide with Saul’s numbers. Of course, as Saul has pointed out, it is extremely wise to go to each company’s investors relations page to verify the numbers. E Trade has been spot on so far.
Takes me about a minute with a calculator.