# Armor Class (AC) Every creature and object in the game has an associated Armor Class (AC). AC is a Challenge Value set to determine whether something hits and does damage to another thing. A player's [[Dexterity]] score combined with wearing armor usually impact their AC. Without armor or a shield, your character’s AC equals 10 + their Dexterity modifier. However, some mundane materials and objects have set ACs. See the table below for reference: | **Material, Object, or Substance** | **AC** | | ---------------------------------- | ------ | | Cloth, paper, rope | 11 | | Crystal, glass, or ice | 13 | | Wood, bone | 15 | | Stone | 17 | | Iron, steel | 19 | | Mithral | 21 | | Adamantine | 23 |