Let's say you're exploring a niche to start a website in. One of the first things (besides exploring possible traffic) is to see what sort of money you'll be getting from Adsense. Is there any correlation between what you'd be paying for a click as an AdWords advertiser and how much you'll receive as an AdSense publisher (What's your cut after Google takes their cut?) -Brian Renner entrepreneur7
The best way to see what kind of money you'll be getting is the Overture bidtool. Although $$$ don't line up exactly with Adwords, they must be pretty close. Google doesn't publish what percentage you get, but I'm guessing about 50%.