Diablo Item Rarity Calculator
#1
Diablo Item Rarity Calculator

This is a javascript utility that can be used to calculate the rarity of any magical item in terms of any single game's chance to create the item. It also displays the best dungeon level to find the item and the best drop probabilities from various sources. The program also allows rarity calculations for multiple base items and affixes. It does not calculate rarity from items available for purchase at the vendors.

The calculations were based on several assumptions:
  • Values from Jarulf's Guide, chapter 3.8 (item creation in dungeons) were used
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  • Average dungeon layout modeled by the information from the chapter dealing with unique item rarity.
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  • All spells have an equal chance of being chosen (probably not accurate). Any information about spell selection will be appreciated
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  • Valid for Diablo v1.09 multiplayer only<>
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    Sample Output:
    Awesome Full Plate Mail of the Suffix:
    *******************************************

    Rarity:
    0.4157539% 1 in 240 games
    0.4236866% (N) 1 in 236 games
    0.4236866% (H) 1 in 236 games

    Best drop probability:
    0.1759345% dlvl 15 (n,N,H)
    1) 0.3850823% Armor Rack (dlvl 15)
    2) 0.0263684% Sir Gorash(Blood Knight,n,N,H) Arch-Bishop Lazarus(Advocate,n,N,H)
    3) 0.0006973% Soul Burner(mlvl 30,n,N,H) Blood Knight(mlvl 30,n,N,H) Advocate(mlvl 30,n,N,H)


    Rarity:
    Given as both a probability of any one game creating the item and as the statistical number of games that would need to be cleared to find the item for all three difficulties. The rarity will normally be the same for all difficulties except for those items that has a base item qlvl higher than that of both affixes.

    Best drop probabilty:
    The three top probabilities will be chosen from: 1 unique enemy (or multiple if 2+ unique enemies have the same drop probabiltiy), 1 normal enemy, and 1 dungeon source. Because of this, there may be larger probabilities than those that are displayed 2nd or 3rd, but I thought it would be boring if the list contained nothing but unique enemies. Also, including various sources helps users determine the best areas to find the item.

    Please feel free to give suggestions (just remember they are just that) or report errors/bugs. I would ike to include armor/weapon rack probabilites into the final rarity calculation as well, so any information about their generation rates would be helpful (I was estimating 1 armor and 1 weapon rack per game). Also, if anyone else is willing to host the calculator it would be much appreciated, website maintenance is not my forte.

    Thanks to those who participated in the Monster Creation thread for insight on a very important aspect of the rarity calculations (all the normal monsters!). Special thanks to Jarulf for the help and, of course, for the information about item creation in his guide. This calculator would not have been possible without either of these.
--Lang

Diabolic Psyche - the site with Diablo on the Brain!
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Messages In This Thread
Diablo Item Rarity Calculator - by the Langolier - 09-03-2003, 08:45 AM
Diablo Item Rarity Calculator - by the Langolier - 09-03-2003, 08:58 AM
Diablo Item Rarity Calculator - by LennyLen - 09-03-2003, 09:25 AM
Diablo Item Rarity Calculator - by Sr.Juez - 09-03-2003, 03:29 PM
Diablo Item Rarity Calculator - by Mick - 09-03-2003, 05:07 PM
Diablo Item Rarity Calculator - by LemmingofGlory - 09-03-2003, 07:47 PM
Diablo Item Rarity Calculator - by LennyLen - 09-03-2003, 08:19 PM
Diablo Item Rarity Calculator - by Bolty - 09-03-2003, 09:40 PM
Diablo Item Rarity Calculator - by DeeBye - 09-03-2003, 10:18 PM
Diablo Item Rarity Calculator - by Scorzonera - 09-04-2003, 08:19 AM
Diablo Item Rarity Calculator - by Walkiry - 09-04-2003, 10:24 AM
Diablo Item Rarity Calculator - by Scorzonera - 09-04-2003, 11:33 AM
Diablo Item Rarity Calculator - by the Langolier - 09-04-2003, 07:44 PM
Diablo Item Rarity Calculator - by Walkiry - 09-04-2003, 11:42 PM
Diablo Item Rarity Calculator - by Pu uhonua - 09-06-2003, 01:39 PM
Diablo Item Rarity Calculator - by the Langolier - 09-06-2003, 11:41 PM
Diablo Item Rarity Calculator - by Daemon - 09-07-2003, 04:07 AM
Diablo Item Rarity Calculator - by Sr.Juez - 09-07-2003, 03:50 PM
Diablo Item Rarity Calculator - by fatherbrainLBL - 09-09-2003, 10:54 PM
Diablo Item Rarity Calculator - by fatherbrainLBL - 09-09-2003, 10:56 PM

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