Introduction
This OSRS DPS calculator shows how much damage you deal per second in Old School RuneScape. Pick your gear, set your stats, choose a monster, and see your max hit, accuracy, DPS, and time to kill.
You can build up to four loadouts and compare them side by side against the same boss. Test melee, ranged, and magic setups. Try different weapons, prayers, potions, and spells to find what kills fastest. If you only want the top-end damage number for a single hit, the OSRS Max Hit Calculator handles that on its own.
The tool covers bosses like Vorkath, Zulrah, General Graardor, and slayer monsters. It also handles special items such as the Twisted bow, Dragon hunter crossbow, Slayer helmet, and Salve amulet, plus defence drops from the Dragon warhammer and Bandos godsword.
Every answer comes with a step-by-step breakdown, so you can see the exact math behind your DPS. Charts show your hit spread, kill time odds, and how DPS changes as monster defence goes up. You can also check XP per hour and GP per hour to plan your training or money making with the OSRS Skill Calculator.
How to use our OSRS DPS Calculator
Enter your combat stats, gear, prayers, and the monster you are fighting, and this OSRS DPS calculator shows your max hit, accuracy, damage per second, and time to kill.
Loadouts: Click "Add Loadout" to build up to 4 setups. All of them fight the same monster so you can compare them side by side.
Loadout name: Type a name for the setup, like "Whip" or "Tbow", so it is easy to spot in the results.
RuneScape Name (RSN): Type your username and click "Load Stats" to pull your levels from the OSRS Hiscores.
Combat skill levels: Set your Attack, Strength, Defence, Hitpoints, Ranged, Magic, and Prayer levels. Use the + and − buttons or type the number. To see how those levels shape your combat level, try the OSRS Combat Calculator.
Manual Mode: Turn this on to skip the gear builder and type your effective levels and gear bonuses yourself.
Equipment slots: Click a slot to pick an item. Click the small × to take it off.
Equipment presets: Pick a ready-made setup, like Max Melee or Max Ranged, to fill every slot at once.
Budget cap: Drag the slider or click Starter, Mid-Tier, or End-Game to hide gear that costs more than you want to spend.
Auto-Equip Best: Click this to let the tool pick the best gear you can wear and afford for your current style.
Clear All Gear: Click this to empty every slot and start again.
WikiSync: Turn this on to try to load your gear straight from RuneLite.
Prayers: Click a prayer to switch it on. Prayers that clash turn off by themselves, and ones above your level are locked. Need more Prayer levels first? The OSRS Prayer Calculator works out the bones and ashes you need.
Auto (Best for Style): Click this to turn on the strongest prayers your Prayer level allows.
Potion / boost: Choose the potion you drink, like Super combat or Ranging potion, to raise your levels.
Situational boxes: Tick Slayer task, Void set, Cannon, or Vengeance if they apply to your trip.
Combat Style: Pick Accurate, Aggressive, Rapid, and so on. Pick "Auto" to let the tool choose the best DPS style.
Attack Bonus Type: For melee, choose Stab, Slash, or Crush to match the attack your weapon uses.
Spell: For magic, choose your spell. Powered staffs use their own built-in damage.
Number of targets: For AoE spells, enter how many monsters you hit, from 1 to 9.
Override attack speed: Tick this and enter a speed in ticks or seconds if you want to set it yourself.
Special attack: Tick this to add spec damage, then set your spec energy and choose if it regenerates during the fight.
Monster search: Type a boss or monster name and pick it from the list. Its stats load on their own.
Variant / phase: If a monster has phases or forms, pick the one you are fighting.
Customise Target Stats: Tick this to edit the monster's levels, defence bonuses, and attack speed by hand.
Monster Attributes: Tick tags like Demon, Undead, or Dragon so special gear bonuses apply.
Defence Reductions: Pick a spec like Dragon Warhammer or Elder Maul, and add Bandos Godsword drain, to lower the monster's defence.
Monster's Current HP: Set the HP you start from. This drives the time-to-kill number.
Tombs of Amascut Raid Level: For ToA bosses, enter your raid level so monster stats scale up.
Output units: Choose how time to kill is shown (seconds, minutes, or ticks) and how damage rate is shown (per second, tick, or minute).
Drop value and supply cost: Enter GP per kill and GP spent per hour to see your kills per hour, GP per hour, and XP rates. If you are chasing a rare drop, the OSRS Dry Calculator shows your odds over that many kills.
Calculate: Click Calculate to update your DPS, max hit, accuracy, charts, and step-by-step math. Click Reset to start over.
What Is DPS in Old School RuneScape?
DPS means "damage per second." It tells you how much damage you deal to a monster each second, on average. In OSRS, a big max hit does not always mean fast kills. Speed and accuracy matter just as much. DPS puts all of it together into one number so you can compare gear, prayers, and combat styles fairly. The same idea shows up in other games too, which is why a general DPS Calculator exists for non-RuneScape builds.
The Three Parts of DPS
- Max hit: the biggest damage one attack can roll. Your Strength (or Ranged, or Magic) level and your strength bonus set this number.
- Accuracy: the chance your attack lands instead of splashing for 0. This comes from your attack level, your attack bonus, and the monster's defence.
- Attack speed: how often you swing. Speed is counted in game ticks, and 1 tick is 0.6 seconds. A whip hits every 4 ticks (2.4 seconds), while a blowpipe hits every 3 ticks (1.8 seconds).
When an attack lands, the damage is a random roll from 0 up to your max hit, and every number has the same chance. So your average hit is about half your max hit, times your accuracy.
Accuracy: Attack Roll vs Defence Roll
OSRS compares two numbers each attack. Your attack roll comes from your effective attack level and your gear's attack bonus for the style you use. The monster's defence roll comes from its defence level and its defence bonus against that same style. The bigger your roll is compared to theirs, the more often you hit. If you want to see the raw probability behind those rolls, the math is the same coin-flip logic used anywhere else.
This is why the attack type matters so much. Many monsters are weak to crush but strong against stab, or weak to magic but tanky against ranged. Picking the right style can double your DPS without changing a single item.
Things That Boost Your Damage
- Prayers: Piety, Rigour, and Augury raise your effective levels by a big percent. Only one prayer from each group works at a time.
- Potions: Super combat, ranging potions, and overloads add levels for a few minutes.
- Special gear: Salve amulet helps against undead. Slayer helmet and black mask help on task. Twisted bow gets stronger against high-magic bosses. Dragon hunter gear helps against dragons.
- Void Knight sets: add a flat percent to accuracy and damage.
- Defence draining: Dragon warhammer, Elder maul, Bandos godsword, and Arclight lower a boss's defence, which raises your accuracy for the rest of the fight.
Time to Kill (TTK)
TTK is how long a kill takes. It is the monster's hitpoints divided by your DPS. Because damage is random, real kills are sometimes faster and sometimes slower than the average. Kills per hour comes straight from TTK, and that is what decides your loot per hour and your XP per hour. To turn that XP rate into levels, feed it into the Runescape XP Calculator.
Why Comparing Setups Matters
The best gear for one boss can be weak at another. A slash weapon is great on a boss with low slash defence but poor on one with high slash defence. A cheap crossbow can beat an expensive bow in some fights. Comparing max hit, accuracy, DPS, and TTK side by side is the only way to know which loadout truly kills faster. Players who also grind skilling money makers can plan those hours with the OSRS Mining Calculator or the OSRS Agility Calculator.