Xeric Purple Odds
Chambers of Xeric Calculator Created by Dues

Purple Odds

Supported for Mega Scales

Enter the raid's total points and each player's personal points to see the chance at a purple on every remaining roll of the Great Olm's chest. As each roll resolves, pick who won it (or mark it a no-drop) and everyone still in the running gets a bigger share of what's left.

The Great Olm amid its crystal-lit lair
Raid Setup 570,000 pts / roll
Toggle the solo raider button if you are the only raider.
: :
Optional — adds time estimates to the item odds below.
Add your own row above, then check this — we'll total everyone else into one "Other Players" entry from the team points above.
Reward Rolls Assign who won each roll as it resolves
Odds by player
Unique Item Odds
Per-Item Chance
ItemRarityChance this raidAvg. raids for oneAvg. time for one

How the math works. The reward pool rolls once for every full 570,000 team points, each such roll capped at a 65.7% chance at a purple; any leftover points below that threshold form one final roll scaled the same way (leftover ÷ 570,000 × 65.7%). Within a roll, a still-eligible player's share of that roll's chance equals their personal points divided by the personal points of everyone still eligible — so once a roll is assigned to a player, they drop out of the pool for every roll after it, and everyone left splits the remaining chances between them.

"Chance of ≥1 purple" on each player's card assumes today's eligible roster holds for every roll still to come; assigning a roll to a player (or marking one a no-drop) recalculates it instantly.

Unique item odds. Once a purple is hit, which item it is depends only on a fixed table — not on points or raid level — so a player's chance at a given item in one raid is their chance at any purple on each roll, times that item's fixed odds, combined across every roll in a fresh, unresolved raid at today's team points. "Avg. raids for one" is just the inverse of that per-raid chance: how many raids like this one, back to back, it should take on average before that item drops. Fill in a raid time above and "Avg. time for one" multiplies that raid count out into hours and days — still assuming every raid takes the same time and hits the same points. Olmlet is not part of that fixed table — it's checked separately at 1/53 every time a player receives any unique, so the same "chance of a unique this roll" feeds a second, independent roll for the pet.