Race Reroll Calculator
Pick the races you want, set your planned rolls (free rolls from codes count), and see the true binomial odds — plus the cheapest Robux pack combination to finish the job.
Target races
Pick every race you would be happy to land — odds are summed.
How reroll odds are computed
- 1
Race probabilities sum linearly — targeting Kitsune + Archangel adds both individual chances.
- 2
At-least-one odds are binomial: 1 − (1 − p)^rolls. Pity (where it exists) makes the tail deterministic.
- 3
The pack solver is a min-cost DP over the shop bundles — it finds the cheapest Robux combo covering your missing rolls.
Frequently asked questions
What are the odds of rolling Kitsune in The Forge? ＋
Kitsune sits at roughly 0.18% per roll (about 1 in 556). With its 500-roll pity, a guaranteed Kitsune never costs more than 500 rolls — 90% of players land it within ~1,275 rolls without pity.
Do free rerolls from codes count toward pity? ＋
Free rolls behave like normal rolls for the binomial math — subtract them from your planned roll count. Pity thresholds still apply to the total rolls made.
Which reroll pack is the best value? ＋
The 60-roll pack at 1,999 Robux is the cheapest per roll (33.3 R$/roll vs 49 R$ for singles). The solver always picks the lowest total cost combo, even when that means mixing packs.