Calculate average damage per round (DPR) for PF2e characters — weapons, spells, and status effects
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1. Attacker Stats
2. Target Stats
3. Attacks & Damage Sources
+ Add another attack or spell
4. Status Effects (per-round)
Frightened: Reroll attack rolls that miss (takes worse). Sapped: Reduce damage dice by 1 (1d6 becomes 5 flat). Enfeebled: Flat -1 per damage die. Staggered: Target gets 1 fewer action (+1 extra attack for you).
Results
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How to Calculate Pathfinder 2e Damage Per Round (DPR)
DPR = (Hit Chance × Avg Damage per Hit) × Number of Attacks per Round.
In Pathfinder 2e, your attack bonus against a target's AC determines your hit chance. A d20 roll
needs to meet or exceed (AC - Attack Bonus). The formula for hit chance is:
Critical hits on a natural 20 deal double damage dice. Critical fumbles on a natural 1 always miss.
Use this calculator to compare builds, optimize your action economy, and plan your combat strategy
for your Pathfinder 2nd Edition game. Whether you're a weapon-focused fighter or a spell-slinging wizard,
understanding your average DPR helps you make informed tactical decisions at the table.
Understanding Damage in Pathfinder 2e
Pathfinder 2e rewards players who understand the numbers behind a Strike. Because the system uses four degrees of success instead of a simple hit-or-miss, a single point of accuracy can swing a turn from a glancing blow to a devastating critical. This calculator turns your attack bonus, the target's Armor Class, and your damage dice into expected damage per turn, so you can compare builds and weapons without rolling a hundred practice attacks.
How this calculator works
Enter your attack modifier, the target's AC, your weapon's damage dice and ability modifier, and how many Strikes you plan to make. The tool applies the multiple attack penalty automatically and returns your expected damage across the whole turn, including the extra damage from critical hits.
The rules behind the math
In PF2e you roll a d20, add your modifiers, and compare to the target's AC. There are four outcomes. You critically succeed if your total beats the AC by 10 or more, or if you roll a natural 20 that would already be a success. You succeed if you meet or beat the AC. You fail if you miss, and you critically fail if you miss by 10 or more. A critical hit deals double damage, which is why raising your accuracy is often worth more than adding a bigger die.
The multiple attack penalty matters too. Your second Strike in a turn takes a minus 5 penalty, and your third takes minus 10 (minus 4 and minus 8 with an agile weapon). That steep drop-off is why a third attack rarely pays off against a well-armored foe.
Worked example
A level 5 Fighter with a plus 14 to hit swings a longsword (1d8 plus 4) at a target with AC 22.
You need a total of 22 to hit, so any roll of 8 or higher connects.
You critically hit on a total of 32 or more, which means a die roll of 18, 19, or 20, roughly a 15 percent chance.
Average damage is 8.5 on a normal hit and 17 on a critical.
Your first Strike lands often; your second, at minus 5, needs a 13 or higher and connects far less. The calculator weighs all of this into one expected-damage number.
How to use it at the table
Enter your Strike bonus and the enemy AC. If you are unsure, an AC roughly equal to 16 plus the creature's level is a solid benchmark.
Add each Strike you intend to make so the penalty is applied correctly.
Compare two weapons by changing only the damage dice.
Test whether that third attack is worth more than a different action, like Raise a Shield or Demoralize.
Tips
Accuracy beats dice size in PF2e because criticals double your damage.
Debuffs that lower enemy AC push more of your hits into the critical range, so they help every attack you make.
Agile weapons soften the multiple attack penalty, making extra Strikes more viable.
Frequently asked questions
Does it use official PF2e rules? Yes, it follows the standard four-degrees-of-success and multiple attack penalty rules.
Does it handle criticals? Yes, critical hits double your weapon damage and are factored into the average.
What about property runes or extra dice? Add them to your damage input and the expected value updates.