Introduction
Hit points (HP) tell you how much damage your D&D character can take before they drop. This D&D HP calculator works out your character's maximum HP in seconds, so you can get back to playing.
Just pick your class and level, type in your Constitution modifier, and choose how you want to gain HP. Pick Fixed (Average) to take the set number each level, or Rolled to roll your hit dice like a real level-up. Your first level always uses the biggest number on your hit die, just like the rules say.
The tool handles the tricky stuff too. You can add more than one class for multiclass builds, switch between the 2014 and 2024 rules, and check boxes for the Tough feat, Hill Dwarf toughness, or a sorcerer's Draconic Resilience. It also shows the lowest and highest HP your build could ever reach.
Every answer comes with a full breakdown and step-by-step math, so you can see exactly where each hit point came from and copy it onto your character sheet with confidence. Building a character from scratch? Pair this with our Point Buy Calculator to lock in that all-important Constitution score first.
How to use our D&D HP Calculator
Pick your ruleset, your class or classes, your levels, and your Constitution modifier. The calculator shows your total maximum hit points, a full HP breakdown, step-by-step math, and your lowest and highest possible HP.
Ruleset: Choose 2014 rules or 2024 rules. This sets the fixed average value for each hit die.
HP Calculation Mode: Pick Fixed (Average) to use the set average for each level, or Rolled to roll each hit die. Level 1 of your primary class always uses the top number on the die. If you want to compare the two approaches, our Dice Average Calculator shows what a die is expected to give you over many rolls.
Constitution Modifier: Type your Con modifier, not your Con score. Use a whole number from −10 to +10. It is added at every level.
Class: Choose your class from the list. The hit die size (d6, d8, d10, or d12) is set for you.
Level: Enter how many levels you have in that class. Your primary class can go up to 20, and all class levels together must stay at 20 or less.
Add Class: Click this to add another class row for a multiclass character. Use Remove to delete a row you do not need.
Draconic Resilience: This box shows up when you pick Sorcerer. Check it to add +1 HP per Sorcerer level.
Tough Feat: Check this box to add +2 HP for every character level.
Hill Dwarf / Dwarven Toughness: Check this box to add +1 HP for every character level.
Calculate HP / Roll for HP: Click to get your total. In Rolled mode, each click rolls new hit dice.
Reset / Clear All: Click to clear your build and start over with the default values.
What Are Hit Points in Dungeons & Dragons?
Hit points (HP) show how much damage your character can take before dropping to 0 and falling unconscious. Every character has a maximum HP number written on their sheet. You lose HP when you get hit, and you get it back by resting, healing spells, or potions. Your max HP grows every time you gain a level.
Hit Dice by Class
Each class uses its own hit die. Tougher classes roll bigger dice, so they gain more HP per level.
- d6: Sorcerer, Wizard
- d8: Artificer, Bard, Cleric, Druid, Monk, Rogue, Warlock
- d10: Fighter, Paladin, Ranger
- d12: Barbarian
How D&D 5e HP Is Figured Out
At 1st level you take the highest number on your class hit die. A Fighter starts with 10, a Wizard starts with 6. Then you add your Constitution modifier.
At every level after that, you pick one of two ways:
- Fixed (average): take the set number for your die — d6 gives 4, d8 gives 5, d10 gives 6, d12 gives 7. This is safe and steady.
- Rolled: roll your hit die and use what you get. You could roll high and gain a lot, or roll a 1 and gain almost nothing. Curious about the odds of a bad streak? The Dice Probability Calculator spells out how likely each result is.
Either way, you add your Constitution modifier on top for that level. Note that this is the modifier, not the score. A Constitution score of 16 gives a +3 modifier. If your Con is low, the modifier can be negative and pull your HP down. A level can never give you less than 1 HP.
Bonus HP from Feats and Traits
- Tough feat: +2 HP for every level you have.
- Hill Dwarf (Dwarven Toughness): +1 HP for every level you have.
- Draconic Resilience (Draconic Sorcerer): +1 HP for each Sorcerer level.
Multiclass HP
If you multiclass, you use the hit die of the class you gained the level in. Only your very first level gives you the maximum die roll. Levels from a second or third class always roll or take the average, even the first level in that new class. Your total level across all classes caps at 20.
2014 vs. 2024 Rules
The 2024 Player's Handbook keeps the same hit dice and the same average numbers as the 2014 rules, so the math works out the same way. The main change is wording and how some class features are described, not the HP formula itself.
Tips for More HP
Raising your Constitution helps the most, because it adds HP on every single level, past and future. Ask your Dungeon Master before switching between rolling and taking the average — most tables want you to pick one method and stick with it. Also remember that temporary HP from spells and features sits on top of your max HP and does not change this number.
Related Tabletop Tools
Once your HP is set, keep the rest of your table math just as quick. Dungeon Masters can size up a fight with the DnD Encounter Calculator and work out monster difficulty using the DnD CR Calculator. If you want to know how fast your build actually drops enemies, run the numbers through the DPS Calculator. Card and dice gamers may also like the Card Draw Calculator, the MTG Probability Calculator, and the Drop Chance Calculator for loot odds.