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Ready
Enter an expression and roll.
Enter an expression and roll.
Supported: NdS, +/− modifiers, kh/kl/dh/dl keep/drop rules, and ! exploding dice. Example: 4d6dl1+2.
Quick dice
Exact probability
—Minimum
—Maximum
—Mean
—Chance ≥ target
Distribution
Calculate a simple dice expression to see its exact distribution.
Custom decision die
Result
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Up to 1,000 custom faces. Selection uses the same unbiased cryptographic random source.
Monte Carlo simulator
Observed session
—Average
—Minimum
—Maximum
—Unique totals
Simulation supports the same roll expression parser, including keep/drop and explosions.