The AdSense
Calculator helps Google AdSense affiliates understand what
affects their earnings by letting them experiment with values.
It also allows Google AdSense users to take their current
statistics and calculate how much they can expect to earn daily,
monthly and yearly. Site owners who are considering implementing
AdSense on their site(s) can also use this tool to estimate what
results they are likely to see.
Daily Page Impressions
Daily page impressions indicate how many times ads are shown per
page. You can use your average, anticipated, or current daily
page impressions for this
Click Through Rate (CTR)
This figure represents how many visitors actually click your
advertisements. You can find this easily on your Google AdSense
stats page labeled "CTR." The average rate is estimated to be
about 1.5%.
Cost Per Click (CPC)
Your CPC is the average of how much you get paid for someone
clicking one of your advertisements. To find your average CPC
take you’re the amount of money you have earned from AdSense
(daily, monthly, or all time) and divide it by your total clicks
(daily, monthly, or all time).