How to Calculate Traffic from Tablets and iPads with Google Analytics

I just wrote a blog post on how tablet traffic to corporate blogs is up 250% in the last year.  I thought some of you might be curious how to measure this stat.  Google Analytics groups tablets and iPads under the Audience > Mobile section of "New Analytics", but it doesn't separate phones from tablets.  It's difficult (impossible?) to get this data without the use of advanced filters and regular expressions trickery.  For those unfamiliar with regular expressions, it's used in programming as an advanced watch to search and match text.  Don't worry about it though, you'll just need to copy and paste what I used.

To get the data, navigate to Audience > Mobile > Devices.  Then create an Advanced Filter.  Include the Screen Resolution field and set the filter type to Matching RegExp.  Set the filter to "(1\d|[7-9])\d\d+x.*" (not including the quotation marks).  In human language, that says "Look for any screen resolution with a three digit number over 700 or a four digit number as the width".  Here's a screenshot:

If you have any questions, just leave a comment and I'll help you out.