Loot Drop Expectation Calculator
Plan your farming sessions with clear expectations. Set your drop chance, track realistic run counts, and stay focused on the target.
Early Access release: January 21, 2026Loot Drop Expectation
Estimate how many runs you need for a target item based on the drop chance you enter.
Target Item
Source Details
Drop Settings
Enter the chance shown in-game or the rate you have observed.
Use this if each run gives multiple independent rolls.
Party & Pace
Tracking
Use this to see your luck percentile based on the current run count.
Results
Values update instantly as you adjust the inputs.
Core Expectations
Confidence Targets
Odds After Milestones
Luck Tracking
Drop Distribution
Lines show drop probability and cumulative chance by run count.
How to use this tool
Set your drop chance
Use the chance shown in-game or the rate you have observed. The calculator works with any value.
Adjust rolls per run
If each run gives more than one independent roll, increase the rolls value to match your run structure.
Turn runs into time
Enter your average minutes per run to convert run counts into time estimates you can plan around.
Farming Scenarios
Estimating Runs for a Rare Drop
You want a specific legendary weapon that has a 2.5% drop chance from a boss. You can kill the boss in 3 minutes per run. Enter 2.5% drop chance and 1 roll per run into the calculator. It shows an expected 40 runs for a 50% chance to see the drop, and 118 runs for a 95% confidence level.
With 3 minutes per run, that's 2 hours for 50% odds and 5.9 hours for 95% odds. Knowing this helps you decide if the grind is worth it or if you should look for alternative gear. If you can increase your clear speed to 2 minutes per run (by optimizing your build or grouping), the 95% confidence time drops to 3.9 hours, saving you 2 hours of farming.
Time saved: Reducing run time by 33% saves 2 hours over 118 runs.
Multiple Rolls Per Run
A dungeon drops loot from 3 chests at the end, each with an independent 4% chance to drop the item you want. Set the drop chance to 4% and rolls per run to 3. The calculator adjusts the probability. Instead of needing 25 runs for a 50% chance (single roll), you only need 9 runs because each run gives you three chances.
This is critical for planning efficient farming routes. Dungeons with multiple loot sources per run are significantly more time-efficient than single-boss farms with the same individual drop rate. The calculator quantifies this difference so you can prioritize the best farming method.
Efficiency gain: 3 rolls per run reduces expected runs by 64% compared to 1 roll per run.
Setting Realistic Farming Goals
You're farming a crafting material with an 8% drop chance. You need 5 copies of the material. Run the calculator for each drop: 50% confidence at 9 runs, 95% confidence at 36 runs. Multiply by 5 materials. You're looking at 45 runs for a 50% chance to get all 5, or 180 runs for 95% confidence.
At 4 minutes per run, that's 3 hours (50%) or 12 hours (95%). This helps you set expectations. If you only have 6 hours to farm this week, you'll likely get 3-4 materials but probably not all 5. The calculator prevents frustration by showing realistic timelines instead of leaving you guessing.
Planning outcome: Set a 10-hour farming session to hit 80-85% confidence for all 5 materials.