I have made a calculator to help predict changes in your earnings depending on improvement (or deterioration) of Page Impressions, Click Through Rate and Cost Per Click. You can see it here - AdSense Calculator

I only just finished it so I'm looking for comments on the wording, ad placement, extra features etc. I'd appreciate hearing any comments you may have.

Thanks, Dan.

hey - works great! looks cool as well. I am just wondering. . .
why would i want to calculate how much i am earning, its not like i can DECIDE what my impresions and CTR will be in real life, u never know. . . therefor calculators of any kind of such will never be accurate, yet thanks for sharring and looks nice! thanks for sharing. Roy.