D&D Hit Points by Level Calculator
Work out a D&D 5e character’s hit points at any level from hit die, Constitution modifier or score, fixed average or rolled HP, up to three multiclass classes, Tough and other per-level bonuses — with a level-by-level table, the chance that rolling beats the average, Hit Dice and short-rest healing.
How it works
Level 1 HP = hit die maximum + CON modifier · each later level adds the class’s fixed value (⌊die ÷ 2⌋ + 1: d6→4, d8→5, d10→6, d12→7) or a roll of the die, + CON modifier, minimum 1 · total = level-1 HP + Σ later gains + per-level bonuses × level (Tough +2) + flat bonuses · CON modifier = ⌊(score − 10) ÷ 2⌋
In the fifth-edition rules a character starts with the maximum of their first class’s hit die plus their Constitution modifier. Each later level adds either a roll of that class’s hit die or its fixed value — half the die plus one — again plus the Constitution modifier, and a level never adds less than 1 hit point. Multiclass characters add each level with the hit die of the class they took it in; only the very first level is maximised. Feats and traits that add hit points per level, such as Tough, count once for every character level. Because the Constitution modifier applies to every level, raising it later raises your maximum by one point per level retroactively. Choose “Roll” to see the expected total and the realistic range from the full dice distribution, and compare it with the fixed average — the fixed value is half a point above a die’s true average, so rolling ends up below it more often than above it.
Worked example
A level-5 fighter (d10) with a +3 Constitution modifier: level 1 is 10 + 3 = 13, then four more levels at 6 + 3 = 9 each, so 13 + 4 × 9 = 49 HP. Rolling instead gives 47 HP on average, and 80% of rolled fighters land between 40 and 54; rolling beats the fixed 49 only about a third of the time. Add three wizard levels (d6, 4 + 3 = 7 each) to make a level-8 fighter 5 / wizard 3, and the total is 49 + 21 = 70 HP with Hit Dice 5d10 + 3d6.
Frequently asked questions
Should I roll or take the average?
Both are standard rules. The fixed value is half a point above the die’s true average (6 versus 5.5 for a d10), so it gives slightly more HP on average and never leaves you unlucky. Rolling is swingier — choose “Roll” to see your expected total, the likely range and the chance of beating the fixed average.
How do I calculate HP for a multiclass character?
Turn on Multiclass and enter the hit die and levels of each extra class; the character level is the total. Your first class gives its maximum hit die at level 1, and every other level adds that class’s fixed value or roll plus your Constitution modifier.
How does the Tough feat change my hit points?
Tough adds 2 HP per character level, including levels gained before you took it. Switch it on under More options; other per-level bonuses such as a hill dwarf’s +1 go in the bonus-per-level field.
What happens to my HP when my Constitution changes?
Your hit point maximum changes as if you had the new modifier from 1st level, so each +1 to the modifier adds 1 HP per level. A level-8 character who goes from +2 to +3 gains 8 HP.
Why is level 1 always the max hit die?
The 5e rules grant maximum hit points from your first hit die at 1st level so new characters aren’t one bad roll from death.
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This calculator is for educational purposes. Double-check important results before acting on them.