DPS Calculator
Dps calculator works out Average damage per attack and Burst DPS from Damage per hit, Projectiles per attack and Seconds between attacks. The default figures on this page give burst DPS of 250; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
4 steps
- Crit factor = 1 + 25% x (2 - 1) = 1.25
- Average damage per attack = 100 x 1 x 100% x crit factor = 125
- Burst DPS = 125 / 0.5 s = 250
- No magazine size given, so there is no reload cycle to account for.
Its 4 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
2 sources
What the dps calculator calculates
Computes expected damage per attack from hit chance and critical rate, burst and reload-adjusted sustained DPS, effective health behind armour or flat mitigation, and the resulting time to kill.
How to use this dps calculator
Enter Damage per hit, Projectiles per attack, Seconds between attacks and Chance to hit. Average damage per attack updates as you type. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Average damage per attack, Burst DPS and Sustained DPS (with reloads).
The method follows OpenStax Introductory Statistics: expected value of a discrete random variable and Old School RuneScape Wiki: Damage per second.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How do I calculate my DPS?
Computes expected damage per attack from hit chance and critical rate, burst and reload-adjusted sustained DPS, effective health behind armour or flat mitigation, and the resulting time to kill. Open “How this is worked out” beside the result to see each step for your own figures.
How to calculate sustained DPS?
It needs Damage per hit, Projectiles per attack, Seconds between attacks, Chance to hit, Critical chance and Critical multiplier. Nothing else is required, and the figures stay in your browser.
Does DPS mean damage per second?
Computes expected damage per attack from hit chance and critical rate, burst and reload-adjusted sustained DPS, effective health behind armour or flat mitigation, and the resulting time to kill. On the figures this page opens with — damage per hit 100, seconds between attacks 0.5 s and critical chance 25% — the burst DPS is 250. Put your own figures in their place and the working updates beside the result.
What information do I need for the dps calculator?
You need Damage per hit, Projectiles per attack, Seconds between attacks, Chance to hit, Critical chance, Critical multiplier, Shots before reloading and Reload time. The page opens with default figures that give burst DPS of 250, so you can see the scale before entering your own.
What does this dps calculator show?
It shows Average damage per attack, Burst DPS, Sustained DPS (with reloads), Damage reduction, Effective health, Attacks to kill, Time to kill and Calculation used, with the working and any warnings for your entries.
Can I check how the dps calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.