Number of visitors per day X 30 X CTR X EPC = Adsense EARNING FOR YOUR MONTH! OR Total Number of visitors per month X CTR X EPC = Adsense EARNING! CTR = Click Through Rate (Percent of visitors from total, clicking the Adsense ads) EPC = Earning per click (Money which get into account when an ad is clicked for once) Through formula it is clear that mostly earning through Adsense depend upon three factors : Total Visitors Per month – That’s why it is said older blogs earn more from Adsense than newer once because of this factor. CTR – Rate of click mainly depend upon the placement and customization of Adsense ads. In my opinion Adsense ads work best when it is placed below the title of posts, but as we know cases are different for different blogs so it doesn’t mean what worked for a blogger will also work for you. So learn placement and customization tricks to increase your CTR. EPC – Based on what type of keyword you are using and what advertisers are paying to google, as higher the google is getting means higher you will earn. You can search many higher paying Adsense keyword on the net.