If you have an adsense account you can check it but if you have very huge traffic then its difficult to know the amount for one click. The secret is how much you get for any specific page or click through and eCPM of your site
you can tell the amount if there is only one click, but if there are two, cant you tell. i know at few days ago, i get a 1.99 per click and after that, google disable my account, for no reason. i didnt even get any email from them saying that my account is disable when i log into my account, i got the message that my account is disablea due to invalid click, but didnt provide any information about the click. with these few word, they disable my account and withhold all the money in my account. i submit the apealling from, still waiting for them to response if they disable my account for life time i will move to yahoo publisher