If you're new to Dungeons & Dragons 5th Edition, one of the first things you'll encounter during character creation is Hit Points (HP). Your HP determines how much damage you can take before falling unconscious — and eventually dying. Get this calculation right, and your character survives deadly encounters. Get it wrong, and you're making death saves before the first boss fight.

This complete guide walks you through every step of HP calculation — from Level 1 basics to advanced multiclass scenarios. Whether you're a first-time player or a veteran DM double-checking a character sheet, you'll find everything you need right here.

Hit Dice by Class — Complete Reference Table

Every D&D 5e class uses one of four hit dice. The larger the die, the more HP you'll have on average:

The HP Formula — Step-by-Step Calculation

Step 1: Calculate Level 1 HP

At Level 1, your HP is the simplest calculation in the game:

Example: A Cleric (d8) with 14 CON (+2) starts with 8 + 2 = 10 HP.

Step 2: HP at Higher Levels (Two Methods)

Method A: Fixed Average (Recommended)

Take the average of your hit die (half + 1) plus CON modifier. This guarantees consistent, fair HP progression.

Method B: Roll Your Hit Die (Risky)

Roll your hit die and add CON modifier. You could roll high and become exceptionally durable — or roll low and fall behind.

Step 3: Permanent HP Bonuses

Some character options grant permanent HP at every level:

• 🛡️ Tough Feat: +2 HP per character level (retroactive)
• ⛰️ Hill Dwarf: +1 HP per character level (racial)
• 🐉 Draconic Sorcerer: +1 HP per Sorcerer level

Complete Example — Level 5 Barbarian

Let's calculate HP for a Level 5 Hill Dwarf Barbarian with Tough feat and 16 CON (+3):

Compare to a Level 5 Wizard with 12 CON (+1): 27 HP total. That's a 43 HP difference — illustrating why tanks need high CON and casters should stay in the backline!

Multiclassing & HP — Special Rules

When multiclassing, HP is calculated based on whichever class you're leveling up:

• Level 1 HP always uses your first class's max hit die
• Subsequent levels use the hit die of the class you're taking
• CON modifier applies to every level regardless of class
• Tough feat applies to total character level, not individual classes

Pro Tips to Maximize Your HP

1. Prioritize Constitution early. 14-16 CON at level 1 is worth more than increasing CON at level 12.
2. Take the average, not the risk. Fixed average is mathematically superior over a full campaign.
3. Hill Dwarf + Tough = HP Monster. Combine for +3 HP per level. At level 20, easily exceed 300 HP.
4. Use temporary HP sources. Armor of Agathys, Twilight Cleric's Channel Divinity, False Life — temp HP stacks.
5. Use our calculator. Try our D&D 5e HP Calculator for instant, accurate results.

Frequently Asked Questions (FAQ)

Q: Do I add CON modifier to HP at every level?

Yes! Your CON modifier is added at Level 1 and every subsequent level. This is why Constitution matters for everyone.

Q: What if my CON modifier changes mid-campaign?

If your CON modifier permanently changes (ASI, magic item), your HP is retroactively recalculated as if you'd always had the new modifier. A +1 increase at level 8 = +8 HP.

Q: Does Tough feat apply retroactively?

Yes! If you take Tough at level 8, you immediately gain 16 HP (2 × 8 levels), and continue gaining +2 per future level.

Q: Rolling vs. Average — which is better?

Average is mathematically superior. The fixed average (half die + 1) is slightly higher than the true statistical average, and it eliminates RNG risk. Only roll if you enjoy gambling!

Q: What's the maximum HP possible at level 20?

A Level 20 Hill Dwarf Barbarian with 24 CON (+7), Tough feat, and all max-rolled hit dice reaches 440 HP. With average method: approximately 345 HP.