Case 1
- Base damage
- 100
- Critical hit chance
- 25%
- Critical damage multiplier
- 2×
125.00
Open with these valuesAverage Damage Calculator
125.00damage
Result: 125.00 damageNo single hit ever deals the average — each one is either normal or a full crit. The average is what a long fight converges on, and it is the fair way to compare two builds. With 100 base damage, a 25 % crit chance and a 2× multiplier it is 125 per hit.
The numbers at a glance
Held fixed: Base damage 100.00, Critical hit chance 25.00 %.
| Critical damage multiplier (×) | Result |
|---|---|
| 1.00 | 100.00 |
| 1.50 | 112.50 |
| 2.00Your value | 125.00 |
| 2.50 | 137.50 |
| 3.00 | 150.00 |
| 3.50 | 162.50 |
| 4.00 | 175.00 |
Worked examples
Case 2
- Base damage
- 250
- Critical hit chance
- 30%
- Critical damage multiplier
- 2.5×
362.50
Open with these valuesCase 3
- Base damage
- 1200
- Critical hit chance
- 15%
- Critical damage multiplier
- 3×
1,560.00
Open with these valuesHow it's calculated
avg = base × (1 + crit chance × (multiplier − 1))
- StepEnter the damage of a normal, non-critical hit.
- StepEnter how often a hit crits, as a percentage from 0 to 100.
- StepEnter what a crit multiplies the hit by — 2 means double damage.
- ResultRead the expected damage of one hit over many swings.
What this number means
A weighted average, from the expected-value rule
The formula is the definition of an expected value, taken from the Wikipedia article on it and checked on 23 August 2026. No game constant lives in this calculator: base damage, crit chance and multiplier all come off your own tooltip.
No single hit ever deals 125
Each swing is either a normal hit or a full crit, so 125 is a value no individual hit shows. It is the level a long fight converges on, which is what makes it fair for comparing two builds.
Misses and armour are not in it
The three fields are base damage, crit chance and crit multiplier; nothing here weights hit chance, armour or resistances. Multiplied by your attacks per second it becomes a DPS estimate that already carries the crits.
The two edges pin the formula down
At 0 % crit chance the average falls back to the base damage, and at 100 % it is base times the multiplier. A multiplier of exactly 1 changes nothing even at a 50 % crit chance.
Commonly misread
My crit multiplier is 2, so my average damage is double the base.
Double only arrives at a 100 % crit chance. At 25 % a 100 base hit averages 125, not 200.
I entered 0.25 for a 25 % crit chance.
The field takes a percentage, so type 25. The formula divides by 100 itself.
The build with the higher crit multiplier deals more damage.
Only together with the chance: 80 base at 50 % and 1.5× averages 100, the same as a 100 base hit that never crits.
Reference table
| Base, crit %, multiplier | What it shows | Average damage |
|---|---|---|
| 100, 0, 2 | No crits — the average is the base hit | 100.00 |
| 100, 25, 2 | One hit in four crits for double | 125.00 |
| 100, 50, 1 | A multiplier of one changes nothing, whatever the chance | 100.00 |
| 100, 100, 2 | Every hit crits — base times the multiplier | 200.00 |
| 250, 30, 2.5 | A heavier hit with a larger multiplier | 362.50 |
| 1200, 15, 3 | Rare but very hard crits | 1560.00 |
Questions
How do I calculate average damage with crits?
Multiply your base damage by an expected factor: avg = base × (1 + crit chance × (multiplier − 1)), with the crit chance as a fraction. Enter it here as a percentage — 25 becomes 0.25 inside the formula. So 100 base damage at a 25 % crit chance with a 2× multiplier gives 100 × (1 + 0.25 × 1) = 125 average damage per hit.
What does average damage mean?
Average damage is the expected damage of one hit over many swings, blending normal hits and critical hits. No single hit equals the average — each is either a normal hit or a full crit — but across a long fight your damage trends toward this number, which makes it the fair way to compare builds.
Should I stack crit chance or crit damage?
Both raise the average, and which helps more depends on where you already sit. More crit chance pays off when your multiplier is already high, while a bigger crit multiplier pays off when your crit chance is already high. The most efficient builds keep the two roughly balanced rather than maxing one alone.
What happens at 0 % or 100 % crit chance?
At 0 % crit chance the average equals your base damage, because no hit ever crits. At 100 % crit chance every hit crits, so the average equals your base damage times the full crit multiplier. Between those extremes the average rises in a straight line with the crit chance.
How does average damage relate to DPS?
Average damage is the per-hit figure; damage per second multiplies it by your attacks per second. Using the average rather than a single hit keeps a DPS estimate honest, because it already accounts for how often crits land.
Sources and last check
Information, not professional advice.