Drop Chance Calculator: How Many Runs for a SkyBlock Drop
Guide · Updated June 2026
Enter a drop chance and how many runs you plan to do to see your odds of at least one drop, plus the runs needed for a 50%, 90% or 99% chance.
Try the tool
Drop Chance Calculator
Turns any drop rate and run count into true odds of getting the item.
What are my real odds of getting a drop?
The calculator works out the chance you fail every single run, then subtracts that from one. This gives your true odds of at least one drop across all your runs, rather than a rough average that overstates your luck.
How many runs do I actually need?
Because no number of runs guarantees a drop, the tool reports the runs needed to cross 50%, 90% and 99% confidence so you can set a realistic target. Raising your Magic Find increases the base chance and lowers the runs required.
- Enter the item's drop chance and your planned run count
- See odds of at least one drop right away
- Higher Magic Find means fewer runs for the same confidence