Loot Drop Simulator
Simulate RNG-based loot drops and understand real probabilities
Quick Presets
Drop Configuration
%
1 in 40 chance
Kills, runs, openings, wishes, etc.
No pity system
Simulation Settings
More simulations = more accurate results
Monte Carlo ModeRandom simulation
Compare ModeCompare two drop rates
Quick Math (Deterministic)
At Least 1 Drop92.05%
Expected Drops2.50
Avg Attempts for 1st Drop40
Cumulative Probability
How Does This Work?
Deterministic Mode uses the mathematical formula P(≥1) = 1 - (1 - dropRate)^attempts to calculate exact probabilities instantly.
Monte Carlo Mode runs thousands of random simulations to build a realistic picture of what outcomes you might see, including distribution patterns and variance.
Pity System guarantees a drop after a fixed number of attempts (commonly used in gacha games like Genshin Impact). When enabled, you automatically receive a drop at the pity threshold if you haven't gotten one naturally.