This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own Vanguards: 2nd Anniversary session. It will not click the shop.
Drop probability
Trait Reroll Odds
Estimates the chance of seeing a trait at least once across independent rerolls. Enter the published percent, so Monarch is 0.1, not 10 and not 0.001. The result ignores hard pity. Monarch still guarantees at 1,500 rerolls on that unit, Ethereal at 858, Deadeye at 400, and Solar at 300. Those counters are per unit and are not part of this formula.
Chance of at least one success = 1 − (1 − chance per attempt) raised to the number of attempts.
Independent trials only: 1 - (1 - chance/100) ^ attempts. The 0.1 default is Monarch's published base rate. One hundred rerolls at 0.1% is about a 9.5% chance of at least one Monarch, and it does not move you to the 1,500 pity. Saint's Heart is a separate 0.1% (1 in 1,000) anniversary-banner drop; do not mix that counter with trait pity.
Material planner
Cake Slice Shortfall
Subtracts the Cake Slices '26 you already hold from a known price. The default is one Saint's Pelvis from the 2nd Anniversary Shop, listed at 10,000 Cake Slices '26. Change the inputs for a 150-slice pull or any other price you can read in the shop. It does not know your inventory.
Required total = materials per upgrade × number of upgrades. Missing = max(required total − materials already owned, 0).
10,000 is the published shop price for Saint's Pelvis only. A banner pull is 150 Cake Slices '26. Stage clears pay 500, Special Stage acts pay 5,000, and Gauntlet acts pay 9,000.