Modify Total XP for Multiple Monsters; Encounter Multipliers

Source: Dungeon Master’s Guide p. 82. Available in the Basic Rules (2014)

Encounter Multipliers

Number of Monsters	Multiplier
1	×1
2	×1.5
3-6	×2
7-10	×2.5
11-14	×3
15 or more	×4
^encounter-multipliers