The Oatmeal presents this useful Zombie Bite Calculator. I suggest you use it now, while you still have the benefit of electricity, a functioning computer, and a live internet connection - you never know when the worst might happen. And information like this could save your life or your loved ones. Personally, it seems I would last 1 hour and 16 minutes after being bitten. I need to bulk up.
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Strange this post is totaly unrelated to what I was searching google for, but it was listed on the first page. I guess your doing something right if Google likes you enough to put you on the first page of a non related search. :)