How to know exact earning $$$ per click from Adsense?

It depends on the niche you will choose and the content. Any results so far?

This isn't an adequate position to take. One needs to have a very close approximation of what you can get for a click in order to run estimates on whether a keywords will be worth the investment of time to pursue.

Let's say you have a keyword with a Adwords CPC of $15.00. Based on traffic stats it may be profitable to pursue the keywords if you are getting paid $2.00 p/click on the content network. It might even still be worth pursuing at $1.00 p/click. When you get into the $0.50 range though, you might be better suited hunting for a different piece of property to mine.

You can't make those decisions without having a good gues of what you'll get paid if you put up a site.

Here's what I do. Once I find a keyword in the Keyword Tool, I open up the "Contextual Targeting Tool" which can be found in the upper left sidebar (but only if you are logged into Adsense) and then punch the keyword in there.

This tool will give you info on what Advertisers are paying for that keyword on the "Content Network"...which just so happens to be you when you show Adsense ads on your site. You can guestimate that you'll get somewhere between 50% and 60% of this figure p/click. Not a guarantee though. I have a site now which used to be paying $1.50 p/click and is now down to $0.48 p/click.

The site is stuck between the #6 & #9 spots though and people that click on those spots behave very differently than people who immediately click the #1 or #2 spot....thus my traffic may be less valuable and thus I'm being paid less. Once I boost my site into the #2 spot (can't take #1 as this is a brand name keyword) I may discover that my traffic all of a sudden became more "valuable" simply because of my site's position with the result being an increase in the CPC paid out to me...even though the content on my site didn't change significantly.

The whole thing is very plastic. But you CAN have a good foundation on which to make a decision whether to give a keyword the green light or not.

This is the best answer so far.

One thing I've found in these forums is that few people seem to know how the system works. You'll find many posts about "why Google pays me 10 cents when the GKT says $2".

First, you are a publisher of ads. There are advertisers out there who want to show their ads but at a reasonable price so they make a profit. The program Google has for advertisers is called Adwords. The reverse program for you, the publisher, is called Adsense.

Adwords is an auction. It works by rewarding the best advertisers with lower spend. The best advertisers are those with higher click rates. The auction is very fluid in many different ways so it's ridiculous to think your earnings per click as a publisher or spend per click as an advertiser will be fixed.

So the answer to your question is, you can't know exactly what your earnings per click will be. You could make an estimate based on recent past data of what it may be in the next week or month but it doesn't mean that's what it will be a year from now.

Besides, the earning per click is not even important. Click rate is. If for every 100,000 visitors to your site, one ad gets a 1% click rate and pays $0.20 while another is 0.5% and pays $0.35, which would you rather have? The first one that pays $0.20 per click. The Adwords system works to reward the best advertisers and it's also how Google maximizes their revenues. So let it do its job and don't worry about CPC. Worry instead on getting more visitors.