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 feedWhat 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 · imagesLive 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-timeRuneProfile
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 logWhat it does
How it works
Bosses included
All 52 bosses, raids, Desert Treasure II, Araxxor and clue tiers — and growing. Raids and clues in gold.
Frequently asked questions about OSRS drop rates
What is the best free OSRS drop simulator?
The OSRS Drop Simulator is a free, browser-based tool that rolls real Old School RuneScape Wiki drop rates for 52 bosses and activities. It simulates boss kills instantly, calculates “how dry am I” odds, and ticks your real collection log via RuneProfile.
Is there a free OSRS drop rate calculator?
Yes. The OSRS Drop Simulator includes a free drop-rate calculator: give it any drop rate and kill count and it returns your exact chance of having seen the drop by now, including the 50%, 90% and 99% kill-count milestones.
Can I import my real OSRS collection log?
Yes. Enter your RSN to import your collection log from RuneProfile (synced by its RuneLite plugin), and your boss kill counts from the OSRS hiscores. The simulator ticks the slots you already own and shows your current KC beside each boss.
How can I simulate boss drops without grinding in OSRS?
Pick a boss and a kill count in the simulator and it rolls the exact Wiki drop tables for those kills instantly, showing every unique you would have received and its total Grand Exchange value.
What does it mean to be “dry” in OSRS?
Being “dry” means you have killed a boss far more times than its drop rate suggests without getting the drop. Each kill is an independent roll with no pity timer, so being dry just means you are in the unlucky tail of the probability curve.
How do I know if I'm dry at Zulrah?
Zulrah's main uniques each drop at 1/1,024, with any unique roughly 1 in 128 kills. Enter your Zulrah KC and the simulator shows the percentage of players who would already have the drop — above about 75% means you are statistically dry.
How unlucky am I at Chambers of Xeric for a Twisted bow?
The Twisted bow is one of the rarest Chambers of Xeric uniques. Enter your raid count and the simulator computes your exact percentile, showing how your count compares to the median raids needed.
What is the difference between drop rate and expected kills?
Drop rate is the chance per kill (for example 1/512). The average kills to a drop equals that denominator, but the median is lower: for 1/512 the median is about 355 kills, so half of players get it before the drop-rate number.
What is the Vorkath Skeletal visage drop rate?
The Skeletal visage drops from Vorkath at 1/5,000. By 4,000 kills roughly 55% of players have it, so a dry streak past about 3,465 KC puts you in the unluckier half.
What is the Tumeken's Shadow drop rate at Tombs of Amascut?
Tumeken's Shadow is the rarest Tombs of Amascut reward, and its effective rate rises with invocation level and raid points. Enter your raid count in the simulator to see your exact dryness percentile.
What is the Scythe of Vitur drop rate at Theatre of Blood?
A purple drops at roughly 1/9.1 per normal-mode Theatre of Blood raid, and the Scythe of Vitur is one of the possible purples on that table. The simulator splits the purple roll into each unique's individual chance.
What are the God Wars Dungeon drop rates?
Each God Wars Dungeon boss rolls uniques on a 1/127 system per kill: armour pieces at 1/381, hilts at 1/508, godsword shards at 1/762 and the pet at 1/5,000. The simulator uses the exact per-item Wiki rates.
What is Nex's drop rate for uniques?
Nex rolls a unique roughly 1 in 43 kills, split across the Torva pieces, Zaryte vambraces, the Nihil horn and the Ancient hilt. The simulator applies each item's share and your team-size split.
What are the odds of an Enhanced crystal weapon seed at Corrupted Gauntlet?
The Enhanced crystal weapon seed drops at 1/400 per Corrupted Gauntlet completion. By 400 completions about 63% of players have it, so dry streaks well past that are common but unlucky.
Is the OSRS drop rate independent on each kill?
Yes. Every kill is an independent roll, so past kills never change your odds and there is no pity timer. Your chance of at least one drop after n kills is 1 - (1 - r)^n, where r is the drop rate.
Where do the drop rates in this simulator come from?
All drop rates come directly from the Old School RuneScape Wiki, Grand Exchange prices from prices.runescape.wiki, and collection-log data from RuneProfile. Every rate is checked against the Wiki's drop tables.