OSRS Loot Simulator & Boss Drop Calculator
Simulate OSRS boss kills to estimate total loot, rare drop chances, pets, and Grand Exchange value. Choose a boss, set your kill count, and see how the drop mechanics play out over a full grind.
Enter a number between 1 and 10,000.
Ready to simulate
Run the simulator to generate randomized drops, estimated GP value, rare drop counts, and the most valuable items from your selected activity.
Guaranteed & Pre-roll
- • 10–18 Desiccated pages always drop.
- • Giantsoul amulet, crown, and prayer scroll are pre-rolls.
Main Table
- • Two main-table rolls per kill.
- • Stacks and quantities are randomized within each entry.
Tertiary Drops
- • Hard clue, elite clue, and Bran pet roll independently.
Static price snapshot and drop rules are used to keep the simulator fast and available without an account.
How the OSRS Loot Simulator Works
Each kill is simulated locally using the selected activity's guaranteed drops, weighted drop tables, independent tertiary rolls, quantity ranges, and special mechanics. Results are random estimates: a 1 in 3,000 pet can appear early or not appear during a long grind.
Supported Bosses & Activities
Artio, Barrows Chest, Branda the Fire Queen, Callisto, Commander Zilyana, Corrupted Gauntlet, Dagannoth Prime, Dagannoth Rex, Dagannoth Supreme, Demonic Gorilla, Doom of Mokhaiotl, Duke Sucellus, Eldric the Ice King, Gemstone Crab, General Graardor, Giant Mole, K'ril Tsutsaroth, Kree'arra, Moons of Peril - Chest, Phantom Muspah, Scurrius, The Whisperer, Tombs of Amascut, Tormented Demons, Vardorvis, Vorkath, Yama, Zalcano.
Estimated GE Values
Loot values are estimates based on the static item price snapshot used by this version of the simulator. Actual GE prices and realized sale values can change.
OSRS Loot Simulator FAQ
What does the OSRS loot simulator calculate?
It runs a randomized simulation for the selected boss or activity and summarizes drop quantities, rare items, average loot value, and the most valuable drops.
Are the results guaranteed to match my actual drops?
No. Each simulation uses random rolls, so results vary between runs. Larger kill counts reduce variance but do not guarantee a specific drop.
How is loot value calculated?
Loot value is calculated from the hardcoded item price snapshot used by this simulator. It is an estimated GP value, not a guaranteed sale price.
Which OSRS bosses are supported?
The simulator includes 28 bosses and activities, including Vorkath, Barrows, God Wars Dungeon bosses, DT2 bosses, Tombs of Amascut, and newer activities.