calculations

anyone

[lightning2004]

now i know if you keep getting page impressions and less clicks your page ctr % goes down..but also i noticed your eCPM goes down has well..whats the equation to determine this..say if i had 1500 page impressions and only 10 clicks is there a way to figure out what my eCPM would be?

[david_uk]

eCPM = (earnings/impressions)*1000

[lightning2004]

i meant lets say i got 500 impressions and 5 clicks and my eCPM is $4.56. how much would my eCPM be if i had 551 impressions and 7 clicks thats what i meant

[david_uk]

Look at the forumla - you need to know the earnings and the impressions to work out eCPM. I'm confused with what you are trying to work out.

eCPM is a way of guaging how various pages on your site compare with each other for earnings. You may have a page with 200 impressions, and a page with 2500 impressions. Using eCPM you can see how each page would perform assuming each page had 1000 impressions - hence comparisons are easy to make.

[FromRocky]

i meant lets say i got 500 impressions and 5 clicks and my eCPM is $4.56. how much would my eCPM be if i had 551 impressions and 7 clicks thats what i meant

if eCPM=(known CPC)*(if clicks)/(if impressions)*1000

where (known CPC)=(known eCPM)*(known impression)/1000/(known clicks)

or

if eCPM=(known eCPM)*(known imp/if imp)*(if clicks/known clicks)

Use your numbers, you will have
if eCPM = $4.56*(500/551)*(7/5)=$5.79

Is this what you're asking for?

[david_uk]

The OP started another thread [webmasterworld.com...] on this recently, and I think there is still some confusion over eCPM there.