How do you calculkate QB rating?

[awtysst]

How do you calculate QB rating? I am curious as to what Carr's was for the day?

 

[awtysst]

NM I figured it out.
Carr had a 110.42 Qb rating.

 

[HJam72]

Try this:

http://brucey.net/nflab/statistics/qb_rating.html

The previous poster was right though, it was 110.something.

 

[samomin]

Yep its 110.4 according to this website:

http://www.footballguys.com/qbrating.htm