Option 1, Check out how much you’re using right now! Log into your current account and look for the section on your monthly data usage.
Option 2. You can go to your phone’s settings (Settings > Cellular Data for iPhone, or for Android Settings Menu > Data Usage > Select Dates for Android). Do a little hunting around and see what you use.
Option 3. We got you. For a rough idea of how much data you need to check out our handy blog.