StatTuner MMORPG build simulatorCombat laboratory
M2 KO OSRS AO
LIVE METIN2 EVENT Active now
Tombola Take part in the Tombola and collect event rewards.
View event guide Source: Stattuner · 11:20 UTC
Calculators & Utility Tools Bio quests, horse, pets, guilds, Gaya, timers and more. Open all tools Free · No login required
Old School RuneScape logo
Attack roll & DPS workbench

OSRS DPS, Max Hit & Gear Calculator

Calculate attack rolls, maximum hits, hit chance, special attacks, incoming damage and time-to-kill.

Exact core roll formulas Loading catalogue… Exact core formulas + special cases
Active buildViewing Build A
02
LOADOUT

Equipment board

04
RESOLUTION

Fight outcome

OUTGOING HIT
—Select gear and a skill
INCOMING HIT
—Target pressure
SUSTAINED DPS
—Cooldown-aware
TIME TO KILL
—Against target HP
Damage pipeline Build A
Exact item effects source totals
05
DECISION

Build A vs Build B

BUILD A DPS
0
VS
BUILD B DPS
0
06
ITEM ANALYSIS

Weapon & accessory comparison

Select one equipment category and compare two recorded items at the same or different enhancement levels. Item A is applied live to Build A and Item B is applied live to Build B, so Fight Outcome and Decision update as soon as you change an item or enhancement.

ITEM A
ITEM B
STEP-BY-STEP GUIDE

How to use the Old School RuneScape DPS calculator

Choose a combat style, enter levels, equip OSRS gear and test attack roll, hit chance, maximum hit, attack speed and DPS against a selected target.

  1. 01

    Select melee, ranged or magic

    Choose the combat style and enter the relevant Attack, Strength, Defence, Ranged, Magic, Prayer and Hitpoints levels.

  2. 02

    Equip the full gear setup

    Select the weapon, armour, jewellery, ammunition and other equipment. The simulator reads the recorded attack, defence and strength bonuses.

  3. 03

    Choose the attack or special

    Select the normal attack, spell, ranged attack or supported special attack that you want to evaluate.

  4. 04

    Select or edit the target

    Choose a target and confirm its HP, defence level and style-specific defence bonus. These values determine the defence roll and hit chance.

  5. 05

    Review the combat pipeline

    The results show attack roll, target defence roll, hit chance, maximum hit, average damage, DPS and estimated time to kill.

  6. 06

    Use A/B for a controlled test

    Keep levels, attack and target identical in both builds, then change one weapon or piece of jewellery to see the real DPS difference.

Controlled comparison tip

A weapon can have a higher max hit but lower DPS because attack speed and accuracy also matter. Compare the complete result, not only one stat.

Old School combat notes

Old School RuneScape DPS is an accuracy, max-hit and attack-speed problem.

A gear piece is only better when it improves the full attack cycle against the selected defence profile. The workbench below helps separate attack bonuses, strength bonuses, weapon speed and target defence.

01

Choose one style

Stab, slash, crush, ranged and magic use different attack and defence bonuses.

02

Max hit is incomplete

A slower weapon can show a larger hit while producing less damage per second.

03

Accuracy matters

Attack level and equipment attack bonuses are compared with the target defence roll.

04

Special cases

Slayer, Wilderness, demon and set effects may need separate conditions beyond visible equipment stats.

The three numbers behind a useful OSRS comparison

First, equipment attack bonuses help determine the attack roll and therefore hit chance. Second, melee, ranged or magic strength raises the maximum hit. Third, weapon attack speed controls how often that expected damage is delivered. A comparison that ignores any one of these can name the wrong winner.

Use the same combat levels, attack style and target in Build A and Build B. Then change one weapon, amulet, ring or armour piece. The result should be judged by hit chance, maximum hit and DPS together.

Why target defence changes the best gear

Against a low-defence target, extra strength may be more valuable because attacks already land frequently. Against a high-defence target, accuracy can recover more expected damage than another max-hit increase. The optimal setup therefore depends on the monster or player profile.

This is also why a highest-bonus list is not a universal build guide. A fast weapon with a lower visible max hit may outperform a slower weapon, and an accuracy-focused item may gain value as target defence rises.

Use special effects as a second layer

Visible equipment stats are the first comparison layer. Conditional effects—such as task, set or location bonuses—should be tested only when their condition is actually active. Mixing unconditional and conditional values creates misleading results.

StatTuner labels the confidence of the active model. When a special case is not fully represented, use the source-stat comparison to understand the item and treat the final DPS difference as a baseline rather than a complete encounter simulation.

CONTROLLED TESTS

What should you compare?

Fast vs slow weaponCompare attack interval, max hit and DPS together.
Accuracy vs strengthRepeat the test on low- and high-defence targets.
Stab, slash or crushUse the correct attack style and matching target defence bonus.
Ranged ammunitionKeep weapon and target fixed while changing ammunition or ranged strength.
Magic gearSeparate magic attack accuracy from magic damage percentage.
COMMON QUESTIONS

Build laboratory FAQ

Why is the highest max hit not the highest DPS?

DPS also depends on hit chance and the number of game ticks between attacks.

Should I use the target’s Defence level or bonus?

The defence roll uses both the relevant level and the style-specific defence bonus. Use a complete target profile where available.

Can a negative attack bonus matter?

Yes. Equipment can reduce accuracy in a combat style even when it provides another useful stat.

Why does the same weapon behave differently on two monsters?

Their defence levels and style-specific bonuses change your hit chance.

Are all special effects included?

Core equipment stats and formulas can be exact, while conditional weapon, set or encounter effects require explicit support.

Reference trailSource pages inform the data review. All explanations and testing workflows on this page are original summaries written for StatTuner.