Constitution represents your character's health and stamina. The constitution
ability score bonus impacts a character's hit points, so constitution is
important for all classes.
Changes to your constitution ability score bonus now apply retroactively to
all the levels you have gained, so such a change will have a significant
impact on the hit point count of a high-level character.
You apply your character's constitution modifier to:
- Each roll of a hit die: Every time you gain a level, the game rolls a hit die
corresponding to your class. The constitution modifier is applied to this
roll, increasing or decreasing it.
- Your fortitude saving throw, used in saving against poison, unconsciousness,
disease, debilitating blows, and similar effects.
- Concentration checks, used to determine whether your spell caster is able to
complete their spellcasting despite being injured in combat. Important for
spellcasters when they are involved in combat
- Any other skill or trade that has Constitution (CON) as a primary attribute
Average Constitution Scores
Example Race or Creature Avg Con Avg Mod
Ghoul, Mummy - -
Centipede, Locust 8-9 -1
Human, Imp, Grick 10-11 +0
Medusa, Nymph 12-13 +1
Light Horse, Merfolk 14-15 +2
Tiger, Chimera 16-17 +3
Polar Bear, Umberhulk 18-19 +4
Elephant, Aboleth 20-21 +5
The Tarrasque 35 +12