OSRS DPS Calculator
Estimate your expected damage per second using max hit, accuracy, and weapon speed.
1 game tick = 0.6 seconds. This tool provides a practical estimate and does not model all OSRS mechanics.
What this OSRS DPS calculator does
In Old School RuneScape, your true combat performance is about more than your max hit. A high max hit feels great, but if your accuracy is low or your weapon attacks slowly, your real damage output can still underperform. This calculator helps you combine the key variables into one useful metric: damage per second (DPS).
Use it to compare setups for bossing, Slayer, raids, or even training. For example, it can help answer practical questions like:
- Is this new weapon actually better than my current one?
- Should I prioritize accuracy gear or strength gear?
- How much does a damage boost from prayers or gear improve my output?
- Roughly how long should this kill take on average?
Formula used in this calculator
The calculator uses a clean expected-value model that works well for quick comparisons.
Modified average hit = Average hit × (1 + Damage Modifier % / 100)
Expected damage per attack = Modified average hit × Accuracy
Attacks per second = 1 / (Attack speed in ticks × 0.6)
DPS = Expected damage per attack × Attacks per second
If you enter target HP, the tool also estimates expected attacks and expected time to kill.
How to use it effectively
1) Start with realistic numbers
Pull your max hit and hit chance from your preferred gear calculator, in-game plugin, or tested averages. Then set your weapon speed in ticks (many common weapons are 4 ticks, but this varies).
2) Compare one change at a time
Change just one variable (like +2 max hit or +5% accuracy) and recalculate. This makes gear and prayer decisions much clearer.
3) Use target HP for practical context
DPS by itself is useful, but expected time to kill gives better intuition for boss phases, trip efficiency, and supply usage.
Quick OSRS DPS optimization tips
- Balance max hit and accuracy: extreme strength with poor hit chance can be weaker in practice.
- Account for attack speed: faster weapons can outperform slower weapons even with lower max hit.
- Use the right combat style and gear: matching enemy weakness can produce large DPS gains.
- Keep boost uptime: potions, prayers, and spec rotations can dramatically alter sustained DPS.
- Test for your specific content: what works best in Slayer may not be best at a raid boss.
Limitations to keep in mind
This tool is intentionally lightweight. It does not fully simulate every game mechanic such as special attacks, delayed attack cycles, damage caps, immunity phases, recoil effects, poison/venom ticks, or complex raid modifiers. For detailed theorycrafting, pair this with specialized calculators or combat simulators.
Frequently asked questions
Is higher max hit always better?
No. If accuracy drops significantly, your expected damage can go down even when max hit goes up.
Why does attack speed matter so much?
OSRS combat runs on ticks. A smaller tick value means more attack opportunities over time, which can raise total DPS.
Can I use this for melee, ranged, and magic?
Yes. The same expected-value framework works for all styles as long as your inputs reflect that setup.
Bottom line
If you want smarter gear choices and faster kills, use DPS as your guiding metric instead of max hit alone. This calculator gives you a fast and practical way to evaluate upgrades before you spend your gold.