Converting files between formats is never a fun thing to do. When you're working on different systems, it's a pain to do, and you often need a lot of software. CloudConvert is a webapp that can convert 140 different file types.
Just upload the file you want to convert and CloudConvert gives you a list of file types it can convert it to. It can then send that file directly to your Dropbox or Google Drive account. It's a pretty simple process and if you don't need to convert between file types very often, CloudConvert's handy to keep around.