Hit Points
Hit_Points Your Hit Points (HP) determine how much damage you can take before you succumb to the long dirt nap. The number of hit points will grow when your character earns experience and advances in levels. Certain perks such as Lifegiver can further increase your hit point total.
Starting hit points are equal to: 15 + ST + (2*EN)
The amount of hit points gained each level is equal to: (ST/2) + EN . If your Strength score is uneven, then you gain 1 HP every odd level.