Probability tool
Arrow odds calculator
Turn the published arrow rates into a real answer: what are your chances after multiple rolls?
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The official sources publish rarity-tier rates, not the weight of each Stand inside a tier. This calculator never invents per-Stand odds.
Chance of at least one36.2%
4.4% per roll · Published rarity-tier rate.
Single roll4.4%
Mysterious Arrow cost90
At least one success
1 − (1 − single roll chance)ⁿLucky costs 3 Mysterious Arrows; Bizarre costs 9. Recipe cost alone does not reveal an unpublished individual Stand weight.