title: How to calculate hours/month usage on Amazon RDS and Pricing?
body: <p>I never used Amazon EC2 or RDS Service. I am trying to calculate my cost using <a href="http://calculator.s3.amazonaws.com/calc5.html" rel="noreferrer">http://calculator.s3.amazonaws.com/calc5.html</a> </p>
  
  <p>I searched a little but could locate answers to some basic things. Can you help me out with this:</p>
  
  <ol>
  <li>What does DB Instance means? 1 Database = 1 Instance or 1 Connection = 1 Instance</li>
  <li>How to calculate hours/month usage? It should depend on the transfer rates or processing time. Is there a way I can get rough Idea about it? </li>
  <li>What if I already have my DB Ready and want to upload it directly (it would be few GBs) then how will it be calculated.</li>
  </ol>
  
  <p>I am new to amazon EC2 and searched stackoverflow and serverfault before posting this question. Got some idea but not specific what I am looking for. Can someone help me out here?</p>