Con	HP Per Level
1-3	-2
4-6	-1
7-14	--
15	+1
16	+2
17	+2 (+3*)
18	+2 (+4*)
19-20	+2 (+5*)
21-23	+2 (+6*)
24-25	+2 (+7*)
* Warrior classes only.

Constitution measures a character's fitness, health, and physical resistance to hardship, injury, and disease. As characters gain levels, their Constitution scores determine how many extra Hit Points they gain on top of their Hit Dice. Constitution also determines the significance of Saving Throw bonuses earned by the smaller races. An especially high Constitution can even allow a character to regenerate Hit Points gradually over time, without the need for rest or magical healing.