Google Traffic Estimator
An easy-to-use Google AdWords tool that gives you an estimated number of clicks certain keywords are expected to attract per day. To use it, you go to Google Traffic Estimator, and you enter the keywords in your advertisements. Then you select language and geographic targeting area, a currency. You can type in your daily budget if you wish.
Google Traffic Estimator tells you the estimated amount of clicks per day you'll receive from a given ad's keywords, a well as estimates on the average cost per click and cost per day of your ad campaign. Google Traffic Estimator allows you to further manage your AdWords campaign by creating a daily budget or by establishing a maximum amount that you'll pay per click.