◆ Old School RuneScape ◆

The OSRS Drop Simulator

Grind any boss thousands of times in a click. See your real drop odds, the exact loot, what it's worth right now, and how your collection log would fill in. All of the grind, none of the lost hours.

⚔️ Launch the simulator 📋 Import my collection log 🍀 Luckiest rolls feed

30+ bosses, raids & activities

1/127 & 1/43 mechanics, exact

Live GE prices

360+ wiki item images

🎲 … simulations run · 🔎 … collection logs searched

What is this?

It's a browser tool that runs an honest simulation of OSRS PvM loot. Pick a boss, set a kill count (or just one kill), and it rolls the real drop tables. You get your odds for any unique, a kill-by-kill loot-box feed, a RuneLite-style tracker with live values, and a read on how your collection log would fill out against your actual account.

Integrations

Everything here comes from the tools the community already trusts. No made-up numbers.

📖

OSRS Wiki

Every drop rate and item image comes straight from the Old School RuneScape Wiki: the GWD 1/127 roll system, Nex's 1/43 unique table, the Gauntlet chest, and dozens of other bosses' uniques, all checked against the source.

Drop rates · images

💹

Live GE Prices

Item values come from prices.runescape.wiki and refresh in real time when you open the page, so every total reflects the current Grand Exchange. If you're offline, a cached set of prices keeps things working.

Real-time

🧬

RuneProfile

Type your RSN to import your real collection log from RuneProfile (synced by its RuneLite plugin). The sim then marks which slots you already own and only counts new unlocks.

Your collection log

What it does

🔍

Searchable boss list30+ bosses, raids and activities in one dropdown. Just start typing.

📊

Exact odds calculatorChance by now, dry chance, expected drops, milestone KCs and a probability curve for any unique.

🎲

Monte-Carlo grindSimulate 100,000 grinders and see the real spread of kills until your drop, from luckiest to driest.

🎁

Loot-box feedWatch each kill open as its own box with item images and OSRS stack numbers. Rares glow gold.

💰

RuneLite loot trackerRunning totals, item count and live GP value, styled like the in-game tracker.

🔬

Dryness and luck analysisFor any boss, see how dry or lucky you are on each individual drop, with odds and percentiles.

🎯

Single-kill modeRoll one kill and see exactly what dropped in an OSRS inventory grid, with chat notifications.

💬

Game-chat drop alertsOSRS-style "Valuable drop" and "funny feeling" messages, using your real username.

👥

Nex team simulationTeams of 3 or 5 with MVP weighting, so you see your personal share of every unique.

📋

Collection-log projectionImport your log and project how many new slots a grind would fill on your real account.

🏆

Raids and delvesChambers of Xeric, Theatre of Blood, Tombs of Amascut and Doom of Mokhaiotl, with chances that scale to your setup.

How it works

Pick a boss or activitySearch the dropdown for General Graardor, Zulrah, Vorkath, Cerberus, Nex, the Corrupted Gauntlet, a raid, whatever you're grinding.

(Optional) import your collection logPaste your RuneProfile JSON or fetch by RSN so the sim knows what you already own.

SimulateOne kill, a fresh batch, or stack more onto the run. Watch the loot, odds and value update instantly.

See where you'd landYour projected uniques, total GP, and how many new collection-log slots you'd unlock.

Bosses included

All 57 bosses, raids, Desert Treasure II, Araxxor and clue tiers — and growing. Raids and clues in gold.

General GraardorCommander ZilyanaKree'arraK'ril TsutsarothNex Alchemical HydraCerberusKrakenThermonuclear smoke devilAbyssal SireGrotesque GuardiansAraxxor ZulrahVorkathPhantom MuspahThe NightmareSarachnisKalphite QueenKing Black DragonGiant MoleScurrius VardorvisDuke SucellusThe LeviathanThe WhispererMaggot King CallistoVenenatisVet'ionChaos ElementalChaos FanaticCrazy ArchaeologistScorpiaSkotizo Dagannoth SupremeDagannoth PrimeDagannoth RexCorporeal BeastCorrupted GauntletZalcanoHesporiOborBryophyta Chambers of XericTheatre of BloodTombs of AmascutDoom of Mokhaiotl Clue: BeginnerEasyMediumHardEliteMaster

Open the simulator →

Frequently asked questions

What is the best free OSRS drop simulator?

This one, obviously! 😄 The OSRS Drop Simulator is a free, browser-based tool that rolls the real OSRS Wiki drop tables for any boss, raid or clue and shows your odds, the loot and its live GE value.

Is there a free OSRS drop rate calculator?

Yes — give it any drop rate and kill count and it returns your exact chance of having the drop by now, with the 50%, 90% and 99% milestone KCs.

Can I import my real OSRS collection log?

Yes — enter your RSN to pull your log from RuneProfile; the sim ticks the slots you already own and only counts new unlocks.

How can I simulate boss drops without grinding in OSRS?

Pick a boss and a kill count and the sim instantly rolls the exact Wiki drop tables, showing every drop you'd get and its total value.

Where do the drop rates and prices come from?

Drop rates from the OSRS Wiki, live prices from prices.runescape.wiki, and collection-log data from RuneProfile — every rate checked against the Wiki.

Is each kill independent — is there a pity timer?

Every kill is an independent roll with no pity timer; your chance of at least one drop in n kills is 1 − (1 − r)ⁿ.

Drop rates, mechanics and item images are sourced from the OSRS Wiki; GE prices from prices.runescape.wiki; collection-log data from RuneProfile. Probabilities are exact; loot uses true random sampling. Raid unique rates scale with points/invocation in-game, so they're shown as representative per-completion figures. This is a fan-made tool and is not affiliated with Jagex.