Where to read these numbers in game
Every price here is a store list price in Robux, taken from the game's own developer products on 3 November 2026. Open the shop, then the currency section: the four Grimoire packs read 10, 50, 100 and 250 spins for R$15, R$50, R$75 and R$150, and the Clan packs are priced identically. The Bloodline ladder is separate: 3 spins for R$19, 10 for R$49, 25 for R$99 and 60 for R$199.
Your budget is your own number, but Robux arrives in fixed bundles on Roblox's own purchase screen, so check what you actually hold before comparing mixes. The planner never assumes a discount you have not been granted.
How the planner chooses a mix
Spins come in fixed pack sizes, so a budget rarely divides evenly. For a given budget the planner searches every combination of that currency's packs and returns the mix with the most spins. When two mixes reach the same spin count it returns the cheaper one, and when both cost the same it returns the mix with fewer purchases, because that is the one that means fewer trips to the shop.
The number in the result is the exact Robux the chosen mix costs. A leftover is normal: if you have R$100 and buy the 100 Grimoire pack for R$75, R$25 cannot buy another pack at any tier, so it stays in your balance.
What this tool cannot tell you
It compares prices, not outcomes. The game publishes no drop rates, no pity counter and no rarity table beyond the two ends of the ladder, Common and Mythical, so nothing here can tell you whether 250 spins will produce the result you want. It also leaves out regional pricing and any Robux bundle discount on Roblox's side, because neither is part of the game's own price list.
Bloodline spins are not a better version of Grimoire spins. They cost three to five and a half times more per spin, and the store's only description of them is that they are spent at the Bloodline Mirror. Treat the higher price as a fact about pricing, not as evidence of power.
Next step
Once you know how many spins you are buying, read what grimoires change, clan spins and the vault, bloodline packs, every other price, free spins from codes.
If you have not claimed the five codes the game's description publishes, do that before buying anything: they hand out 75 Grimoire spins, 35 Clan spins, 35 Bloodline spins and 10 gems. The five codes.