I came across this handy Gluten Free conversion chart from a blog called Married with a Chance of Hails located here. It lays out clearly how much rice, potato starch, tapioca starch and xanthan gum to use in place of wheat flour. The original source is a site called Gygi.
Source: Gygi.com
roodonfood 
Great info. Thanks!
No problem. Thanks for the like. Cheers.
This is a really nifty chart. Thanks for sharing it. Thanks also for stopping by my blog, hope you enjoyed it.
Thanks. I enjoyed your blog as well. Cheers.