Calculate Max Health Dnd

In Dungeons & Dragons 5th Edition, your character's maximum health points (HP) determine how much damage they can take before falling unconscious. This calculator helps you determine your character's max HP based on their class, level, and constitution modifier.

How to Calculate Max Health in D&D

Calculating your character's maximum health points involves several factors:

Determine your character's class and level
Find your constitution modifier
Calculate your hit dice based on class and level
Apply the formula to get your max HP

Each class has different hit dice (d4, d6, d8, d10, or d12) that determine the base health points gained per level. The constitution modifier adds to your health at each level.

The Formula

The basic formula for calculating maximum health points is:

Max HP = (Hit Dice × Level) + (Constitution Modifier × Level)

Where:

Hit Dice is the type of die your class uses (d4, d6, d8, d10, or d12)
Level is your character's current level
Constitution Modifier is your character's constitution score converted to a modifier

For example, a level 5 Fighter (who uses d10 hit dice) with a constitution score of 16 would have a constitution modifier of +3.

Worked Example

Let's calculate the max HP for a level 5 Fighter with:

Hit Dice: d10
Level: 5
Constitution Score: 16 (+3 modifier)

Using the formula:

Max HP = (10 × 5) + (3 × 5) = 50 + 15 = 65

So this Fighter would have a maximum of 65 health points.

FAQ

What is the difference between hit points and hit dice?: Hit points are the actual health value your character has, while hit dice determine how much health you gain when you level up. Each class has a different hit die size.
How do I calculate my constitution modifier?: Subtract 10 from your constitution score, then divide by 2 (rounding down). For example, a constitution score of 16 gives a modifier of +3.
Can my max HP be higher than the formula suggests?: Yes, some classes and feats can increase your max HP beyond the standard formula. These bonuses are added to your calculated max HP.
What happens if my constitution modifier is negative?: A negative constitution modifier will reduce your max HP at each level. For example, a -1 modifier would subtract 1 HP per level.
How does temporary HP work in D&D?: Temporary HP is additional hit points that don't count toward your max HP. They're often gained from spells or special abilities and are lost first when taking damage.