Email Cost Calculator is a tool that helps you calculate your email marketing expenses over a period of 12 months. Simply choose number of subscribers you have, frequency at which you send emails & your subscriber growth rate and the tool will show how much it costs across different service providers & many related useful metrics.

Really nice little service. I was going to create a service myself and was thinking of using Mailchimp but when I saw the comparison to AWS I will no longer do that thanks to this service! Great job!