Base Ability Modifier

An ability modifier is the bonus or penalty associated with a particular ability score. Ability modifiers apply to die rolls for character actions involving the corresponding abilities -- such as attack rolls, saving throws and skills. The modifier is also used with some numbers that aren't die rolls. A positive modifier is called a bonus, and a negative modifier is called a penalty.
The modifier is equal to +1 for every 2 points above 10 in that ability score (or -1 for every 2 full points below 11). For example, constitution 14 provides +2 hit points per level.
In addition, ability scores determine the number of bonus spells for spellcasters. The ability that spells relate to depends on the type of spellcaster:
* Intelligence for wizards
* Wisdom for clerics, druids, paladins, rangers, and spirit shamans
* Charisma for sorcerers, bards, and favored souls.
In addition to having a high ability score, a spellcaster must be of sufficient level in order to gain any bonus spells for a given level.Spellcasters must also have a 10 or higher in the appropriate ability score in order to cast any spells.
==Ability Modifier and Bonus Spells==
=== Modifier Table===
AbilityScore	Modifier/1.5x Modifier*	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level) 	Bonus Spells (by Spell Level)
AbilityScore	Modifier/1.5x Modifier*	0 	1 	2 	3 	4 	5 	6 	7 	8 	9
1 	-5/-5 	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability
2-3 	-4/-4 	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability
4-5 	-3/-3 	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability
6-7 	-2/-2 	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability
8-9 	-1/-1 	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability	Can't cast spells tied to this ability
10-11 	0/0 	- 	- 	- 	- 	- 	- 	- 	- 	- 	-
12-13 	+1/+1 	- 	1 	- 	- 	- 	- 	- 	- 	- 	-
14-15 	+2/+3 	- 	1 	1 	- 	- 	- 	- 	- 	- 	-
16-17 	+3/+4 	- 	1 	1 	1 	- 	- 	- 	- 	- 	-
18-19 	+4/+6 	- 	1 	1 	1 	1 	- 	- 	- 	- 	-
20-21 	+5/+7 	- 	2 	1 	1 	1 	1 	- 	- 	- 	-
22-23 	+6/+9 	- 	2 	2 	1 	1 	1 	1 	- 	- 	-
24-25 	+7/+10 	- 	2 	2 	2 	1 	1 	1 	1 	- 	-
26-27 	+8/+12 	- 	2 	2 	2 	2 	1 	1 	1 	1 	-
28-29 	+9/+13 	- 	3 	2 	2 	2 	2 	1 	1 	1 	1
30-31 	+10/+15 	- 	3 	3 	2 	2 	2 	2 	1 	1 	1
32-33 	+11/+16 	- 	3 	3 	3 	2 	2 	2 	2 	1 	1
34-35 	+12/+18 	- 	3 	3 	3 	3 	2 	2 	2 	2 	1
36-37 	+13/+19 	- 	4 	3 	3 	3 	3 	2 	2 	2 	2
38-39 	+14/+21 	- 	4 	4 	3 	3 	3 	3 	2 	2 	2
40-41 	+15/+22 	- 	4 	4 	4 	3 	3 	3 	3 	2 	2
42-43 	+16/+24 	- 	4 	4 	4 	4 	3 	3 	3 	3 	2
44-45 	+17/+25 	- 	5 	4 	4 	4 	4 	3 	3 	3 	3
46-47 	+18/+27 	- 	5 	5 	4 	4 	4 	4 	3 	3 	3
48-49 	+19/+28 	- 	5 	5 	5 	4 	4 	4 	4 	3 	3
50 	+20/+30 	- 	5 	5 	5 	5 	4 	4 	4 	4 	3
* Usually the strength based damage modifier when wielding a weapon two-handed or the combined bonus when dual-wielding. See also Combat Insight.
===Formula===
 bonus = (ability – (spellLevel + 1) * 2) / 8
*Division is rounded down, to 0 minimum.
*0-level spells receive no bonuses.
*If ability is less than 10+spellLevel, no spells of that level can be cast.
*Ability should be 0 or greater.
*SpellLevel should be between 1 and 9.
 modifier = ability / 2 – 5
 modifier = (ability – 10) / 2
*Division is rounded down.
*Ability should be 0 or greater.
==See also==
*Ability score loss
*Ability damage
*Ability cap
Category:base_Abilities:ability
ability