Attack bonus

Your attack bonus with weapons is a combination of:


 * Base attack bonus + ability modifier + weapon's enhancement bonus + other modifiers

Most melee weapons weapons use Strength for calculating attack bonus. With the Weapon Finesse feat, your attack bonus with a light melee weapon, a rapier, or unarmed uses Dexterity.

Ranged or thrown weapon use dexterity for calculating attack bonus. With the Brutal Throw feat, your attack bonus with thrown weapons (but NOT ranged weapons) uses strength.

Certain weapons use different abilities for calculating attack bonus (e.g., Epic Dynastic Falcata or Staff of Nat Gann). Read more here.

Common bonuses to hit

 * Base Attack Bonus
 * Attack sequence bonuses
 * Halfling Size Bonus
 * Competence bonus (e.g. from bard's Inspire Greatness or from the items)
 * Morale bonus (e.g. from bard's Inspire Courage or Good Hope spell)
 * Racial weapon enhancements
 * Weapon Focus feat
 * Action boost bonus (e.g. from Fighter Attack Boost)
 * Airship training dummy bonus
 * Named item sets
 * Untyped Bonus (Untyped bonuses stack)
 * Korthos Island item sets
 * Shintao ToD set
 * Fabricator's Ingenuity
 * Wrath of Sora Kell
 * Exceptional Bonus (These may not stack, although there exists no way to test that yet)
 * Kensai, Warpriest ToD sets

Common penalties to hit

 * Two Weapon Fighting
 * Power Attack feat
 * Various debuffs (debuffs always stack)

See also:
 * How to Hit Things