How do you calculate the CR of a PC?

[Rycaut]

Specifically in the context of the Planar Wild Shape feat which grants a druid the ability to apply the Celestial or Fiendish (depending on alignment) template to their wild shape form (at the cost of a second use of their wild shape ability for the day).

Since at over 5HD a creature with the Celestial or Fiendish template applied gets Spell Resistance based on their CR (which is also modified by +1 from the template) and to have the two uses of wild shape a day to be able to use the feat in the first place a Druid would likely have at least 6 class levels (so for a PC would have 6 HD) my question is "how is the CR of the PC calculated?"?

The only place I see that even broaches CR calculations is in Monster Creation - but even there it isn't entirely an exact science (for example Humaniods are assumed to have 3/4BAB - does that mean that a FULL BAB character would be a higher CR? Would a multi class Druid with better than 3/4BAB have a higher CR than a 3/4BAB regular Druid?

Does character wealth impact CR? (i.e. does player level wealth especially if in a high magic/high wealth game) change the CR calculation?

[QuidEst]

PC with WBL has CR = level.

[LazarX]

Players constructed in normal ways have a CR of their Class Level -1.

That's on a theorectical basis. If you take a PC in herolab and covert to an NPC, you'll noticed that as monsters they are underpowered for their CR and require out of rule adjustments to buff them up for an encounter. Or simply add more of them to suit.

[Rycaut]

right but this isn't to make them an NPC, it is because there are cases where "CR" is used in a rules context - i.e. to calculate the Spell Resistance granted by the Celestial Template (or the Fiendish Template) when the PC gets to apply it while wild shaping due to a feat (Planar Wild Shape).

Hence the need to know how to calculate CR in a mechanical manner. Something I haven't been able to find the rules location for (but may have just missed in my quick searches of the PRD/D20pfsrd etc)

[LazarX]

Rycaut wrote:

right but this isn't to make them an NPC, it is because there are cases where "CR" is used in a rules context - i.e. to calculate the Spell Resistance granted by the Celestial Template (or the Fiendish Template) when the PC gets to apply it while wild shaping due to a feat (Planar Wild Shape).

Hence the need to know how to calculate CR in a mechanical manner. Something I haven't been able to find the rules location for (but may have just missed in my quick searches of the PRD/D20pfsrd etc)

I'm pretty sure those calculations default to Hit Dice.

[Rycaut]

anyone know where that is documented? This is particularly relevant to PFS play as Planar Wild Shape is (as far as I can tell) PFS legal.