Minecraft : Loot Drop Simulator

Early Access, Beta

This is a work in progress of a loot table calculator that looks at the data loot tables and probabilities. So there's a not working/borken list, and a todo list. Also in the progress is verifying drop rates and distribution, this will take sometime to check the math.

Not working list

  • Creeper, if killed by skeleton
  • Elder Guardian, loot table
  • Guardian, loot table
  • Turtle, lightning

Todo list

  • Looting enchantment and levels
  • Edit loot table, roll your own

Probably unlikely list

  • Items that mobs wear ... these aren't in the drop loot tables
  • Witch potion drops ... these aren't in the drop loot tables and have a strange spawn condition


This is the chance of a drop occurring on a kill, these can vary due to multiple chances for an item to drop. For example, in the case of Witches, redstone has a 1 in 8 chance of drop, but there are 3 chance rolls for this to occur, so the odds of a drop occurring is slightly higher than 1 in 8. There’s also an additional factor of loot drop size, it may decide to drop 0, which is an additional chance of no drop, this lowers the chance of drop occurring.

Other interesting things to consider are range of drop items should an item drop. Spider eyes have 1 in 3 chance to drop as the loot range is from -1 to 1, since you can’t have negative items you end up with 2 in 3 chance of zero.

Loot & Distribution

Loot shows the possible range, some drops are certain and will be 1. Other drops are less certain and can range from 0 to a higher number. Distribution shows how these drops and loot ranges stack up over time, so after many drops which items will have a greater yield. This can be best described as to why you have so many sticks from Witch drops!


Each run adds a number of test drops to the sample size. The larger the sample, the more accurate the results. But be careful, large simulations may crash your computer.

Suggestions or found a bug

Leave me a comment/like on: