Reroll budget
Abyss Star Shards calculator
Find how many normal or Lucky rolls your balance buys before spending. A separate mathematical comparison shows fixed odds without pretending to know the game's pity counter.
What the result means
The budget is exact for the balance and cost you enter: 1,000 shards buys 10 normal rolls with no remainder, or 2 Lucky rolls with 100 left. Planning three Lucky rolls would require another 350 shards. Star Shards pay for race rerolls and race slots; guns and tubes use Cash.
The chance comparison assumes the same independent probability on every attempt: 1 − (1 − p)n. The original community race record also describes a pity meter. Its threshold, reset and target distribution are not reliably established by that record, so these percentages are a mathematical scenario, not your actual account odds or a game guarantee. A listed 90% still allows a 10% miss rate in that model.
The same community record gives Kraken and Sea Angel 0.1% normal / 0.5% Lucky; Shark and Vampire Squid 1% / 5%; Crab and Anglerfish 2.5% / 10.5%. Rounded totals are not silently normalized. Lucky excludes the common Poop, Elf and Coral entries; selecting one correctly shows 0% for that roll type. Human is the starting race, with no listed roll chance, and is not a selectable target here.
Star Shards reference: 100 per normal roll and 450 per Lucky roll; a second slot costs 1,000 and a third 5,000. If reserving a slot, subtract that purchase from the balance first. Do not spend a keeper race merely because a probability projection looks favorable; compare race mechanics before rerolling.