Chris, there are two types of spines...dynamic and static. Static spine is what you are probably asking about. It stays the same regardless of what bow you are shooting them from. Dynamic spine can change from bow to bow and from shooter to shooter...according to how much much center shot your bow is, how long your draw length is, whether or not you shoot with fingers or a release, etc.
Static spine is measured differently for carbon arrows vs wooden arrows. There are several good definitions out there on the Internet for determining static spine from some of the carbon manufacturers. If you can't find them I can copy and paste them for you. There are also several gurus on here that hopefully will see your post and explain it in sort of simple terms.