DPS is damage per second - your average damage output once max hit, accuracy and attack speed are combined. It is the single best number for comparing gear setups against a boss, because a bigger max hit is useless if you rarely land it.

How does the OSRS DPS calculator know my gear stats?

Pick your equipment slot by slot - the full Old School RuneScape item database is searchable, and every attack, strength and magic damage bonus plus your weapon's attack speed is filled in automatically from the game's own data.

How do I increase my DPS in OSRS?

Raise any of the three levers: a higher max hit (strength gear, prayers, potions), better accuracy (attack bonus versus the target's defence), or a faster weapon. Swap items in the picker and watch which change moves your number most against your chosen boss.

Does a higher max hit always mean higher DPS?

No. A slow weapon with a huge max hit can lose to a fast, accurate one. DPS blends max hit, hit chance and attack speed, so a whip often out-damages a godsword on low-defence targets even though the godsword hits harder.

What is time to kill (TTK)?

TTK is the target's Hitpoints divided by your DPS - roughly how long an average kill takes. It is an average, so real kills vary with RNG, but it is the fair way to compare setups on the same boss.

Does the OSRS DPS calculator use the monster's real Defence?

Yes. Choose any boss or slayer monster and its Defence level, Magic level, style-specific defence bonuses, Hitpoints, size and attributes load from Old School RuneScape data - including the newer split of ranged defence into light, standard and heavy.

How accurate is this DPS calculator?

The maths uses the standard OSRS combat formulas - effective levels, the attack and defence rolls, and the hit-chance curve - and is unit-tested against known Wiki values. Weapon mechanics are modelled too: Scythe of Vitur's multi-hits against big monsters, Twisted bow's magic-level scaling, Osmumten's fang's double accuracy roll, Tumeken's shadow's tripled bonuses, and dragonbane / demonbane bonuses. Special attacks are not simulated, and the Toxic blowpipe assumes dragon darts.

OSRS DPS Calculator - Gear, Accuracy and TTK

Metric	Loadout 1	Loadout 2	Loadout 3
Max hit	44	44	44
DPS	7.08	7.08	7.08
vs Loadout 1	Baseline	+0.0%	+0.0%
Hit chance	77.2%	77.2%	77.2%
Avg. TTK	21.2s	21.2s	21.2s
Special attack	N/A	N/A	N/A

Max hit	44
DPS	7.08
Hit chance	77.2%
Avg. time to kill	21.2s
Expected hit	16.98
Attack speed	4 ticks (2.4s)
Attack roll	26522
Target def roll	12096

DPS Calculator: compare gear by kill time, not max hit

This DPS calculator is for OSRS players deciding whether an item swap, prayer, potion, or weapon actually makes a boss faster. Pick a setup and a target above: the useful answer is usually the loadout with the lower average time to kill, not the one with the largest yellow max-hit number.

What a DPS calculator tells you that max hit cannot

DPS combines damage, accuracy, and attack speed. In OSRS, one tick lasts 0.6 seconds, so a 4-tick weapon attacks every 2.4 seconds and a 5-tick weapon attacks every 3.0 seconds. At equal damage and accuracy, the 4-tick weapon makes 25% more attacks in the same time.

The practical calculation is DPS = average damage per attack / (attack speed in ticks × 0.6 seconds). That average includes misses, so an accuracy upgrade can beat a strength upgrade on a high-defence target. Time to kill then divides the target's Hitpoints by DPS. It is an average, not a promise for the next kill, because individual hits still use RNG.

Max hit Useful for a single high roll. It ignores how often that roll can happen.

Accuracy Depends on your attack roll and the target's style-specific defence.

DPS and TTK The comparison numbers to use when choosing gear for repeat kills.

DPS Calculator setup: choose gear, target, and combat assumptions

A useful OSRS DPS comparison changes one decision at a time. Start with the setup you already use, clone the important alternative into Loadout 2, and keep your levels, prayer, potion, and target the same. The result table then shows the percentage difference against Loadout 1 instead of making you do the arithmetic in your head.

Equip the baseline. Use the slot picker or a preset, then select the attack style that the weapon actually uses.
Choose the real boss or monster. Its Hitpoints, Defence, Magic level, size, and attributes load automatically.
Open Combat settings only when needed. Confirm levels, prayer, potion, spell, Void, and relevant set effect before comparing.
Judge the result by DPS and average TTK. A small DPS gain matters more on a long fight than on a low-HP slayer target.

Fair-comparison rule: do not compare a Piety + super combat setup with a no-prayer setup unless the choice you are testing is the consumable itself. The compact Combat settings summary above makes the active assumptions visible without forcing every input into the first screen.

DPS Calculator accuracy: why target defence changes the winner

There is no universal best weapon. A setup that wins on a low-defence monster can lose on a boss when its attack roll fails to clear the target's defence roll. That is why this DPS calculator uses the selected monster's style-specific defence rather than a generic difficulty label.

If this changes	Check this result first	Why it matters
Strength bonus or damage prayer	Max hit, then DPS	A higher ceiling helps only as often as your attacks land.
Accuracy bonus or attack level	Hit chance	Usually gains value as the target's defence rises.
Weapon speed	DPS and average TTK	Tick speed changes the number of chances to deal damage.
Target monster	All four headline metrics	Defence, Hitpoints, size, Magic, and attributes can change the winner.

Use the DPS vs defence chart after the main result, not before it. It keeps your gear fixed and varies the target defence level, which makes defence breakpoints visible. The hit-distribution chart answers the separate question: how likely is each damage range, including a miss?

DPS Calculator mechanics modelled in this tool

Equipment data alone is not enough for high-level OSRS comparisons. The calculator surfaces an in-result note whenever one of the following mechanics changes the number, so a surprising result is explainable rather than a black box.

Scythe of viturMultiple hits against size-2 and size-3 targets; total max hit is shown.

Twisted bowDamage and accuracy scale with the target's Magic level.

Osmumten's fangDouble accuracy roll and its narrower damage range are included.

Tumeken's shadowTripled equipment magic bonuses outside Tombs of Amascut.

DragonbaneApplies only when the chosen monster carries the dragon attribute.

DemonbaneArclight and Emberlight bonuses apply only to demon targets.

DPS Calculator limits and data sources

This is a sustained-DPS comparison tool. It does not simulate special attacks, player movement, phase changes, team damage, raid-room modifiers, or incoming damage. Treat it as the right answer for a stationary target under the assumptions shown above, then account for encounter mechanics separately.

Item and monster choices are searchable from the local game-data snapshot. The combat model uses effective levels, attack and defence rolls, attack speed, target attributes, and the mechanics listed above. For a second opinion or game-update context, check the primary community references below.

OSRS Wiki DPS Calculator Reference implementation and documented calculator conventions.
Old School RuneScape Wiki: Damage per second Definition of DPS and the factors that affect it.
Old School RuneScape Wiki: Attack speed Tick timing used when turning an attack rate into seconds.

Last reviewed 27 July 2026. Recheck a setup after any combat-balance or item-stat update.

OSRS DPS Calculator