Your setup
Clarity of Thought
Improved Reflexes
Incredible Reflexes
Burst of Strength
Superhuman Strength
Ultimate StrengthBurst of Strength + Clarity of ThoughtSuperhuman Strength + Clarity of ThoughtSuperhuman Strength + Improved ReflexesUltimate Strength + Improved ReflexesUltimate Strength + Incredible Reflexes
Chivalry
Piety
Zeal.png)
Attack potion.png)
Strength potion.png)
Super attack.png)
Super strength.png)
Super/divine combat(4).png)
Overload (+).png)
Ranging potion.png)
Divine ranging / bastion.png)
Magic potion
Imbued heart
Saturated heart
Void
Elite void
Black mask (i) / Slayer helm (i) (on task).png)
Salve amulet (i): undead.png)
Salve amulet (ei): undeadSet bonuses by hand
Target
Result
Special attack
What the calculator does
Every number comes from the game's own combat formulas, worked out the way the OSRS Wiki's DPS calculator works them. It is tested against that calculator on about 1,500 set loadouts and on more than 11,000 fights across every monster form both of them have: all but a few give the same max hit, accuracy and damage per second, and each of those few comes down to a known issue in the calculator or a wiki page that says otherwise. More on the methodology page.
- Compare setups: two loadouts side by side against one target, with the difference in DPS.
- Compare targets: up to 5 setups against up to 12 monsters in one grid of DPS, time to kill, max hit or accuracy.
- Defence reduction: land Dragon warhammer, Elder maul, Bandos godsword and other specs first, and see the DPS against the drained target, down to each boss's defence floor.
- Special attacks: fold a spec weapon's special into your effective DPS, as often as your spec energy allows.
- Time to kill: the chance the target is dead by each moment of the fight, not only hitpoints divided by DPS.
- Share links: the whole setup lives in the page's address, so a bookmark or a copied link opens it as you left it.
Best-in-slot DPS by boss
The highest-DPS loadout for every combat style against each boss, searched with this calculator's engine at 99 stats. Open one to see the gear, max hit and time to kill.
Game data on this page comes from the Old School RuneScape Wiki, used under CC BY-NC-SA 3.0. Damage formulas follow the wiki's DPS calculator, osrs-dps-calc by Weird Gloop (GPL-3.0).
OSRS DPS calculator - max hit and accuracy
Calculate your exact damage per second, max hit and accuracy against any monster in Old School RuneScape, for melee, ranged and magic. Pick your gear, prayers, potions and target and the calculator uses the game's real combat formulas - the same integer maths the wiki calculator uses - to the exact truncation.
How OSRS DPS is calculated
DPS combines three things: your max hit (from effective Strength/Ranged/Magic and your strength bonus), your accuracy (your attack roll versus the monster's defence roll), and your weapon's attack speed. RuneTools applies prayers, potions, the void and gear set bonuses, elemental weakness and special weapons (Twisted bow, Osmumten's fang, Scythe, powered staves and enchanted bolts) exactly as the game does.
Frequently asked questions
How is max hit calculated in OSRS?
From your effective Strength (or Ranged/Magic) level after prayers and potions, plus your equipment's strength bonus, run through the game's max-hit formula and any set or special-weapon multipliers.
What affects accuracy?
Your attack roll (effective attack level × equipment attack bonus) versus the monster's defence roll for the style you're attacking with. Higher attack bonus and lower target defence mean more of your hits land.
Does the DPS calculator account for gear set effects?
Yes - Void, Crystal armour, Obsidian, Inquisitor's, Dharok's, Salve amulet, Slayer helm and Dragon/demon-bane weapons are auto-detected from your equipped gear and applied.