This is an excellent way to cover the dimensional analysis / conversion factor portion of the Common Core standards! (HSN-Q.A.1) The file contains one common conversion rate formula sheet, which covers distance, volume, time, and currency. There are two different worksheets, with a total of 23 problems. The first worksheet is one that I typically use in class. These problems contain items that you would expect to see on a standardized test. I use the second worksheet as homework. The problems contain items that are impossible to find the answers to simply by using Google. The problems are very short and simple in the beginning but become increasingly more difficult. As always, I have included an answer key.