This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own Drill to Earth’s Core 🎃👻 session. It will not click the shop.
Material planner
Cores shortfall
Enter 1 Core per unit, the Academy price of the class you want, and the Cores you already hold. The result is how many Cores you still need before that purchase. It does not subtract a code you have not redeemed, and it does not include the separate 2,500 Core roll that copies a passive from another class you own.
Required total = materials per upgrade × number of upgrades. Missing = max(required total − materials already owned, 0).
Keep Cores charged per unit at 1. Class prices in the October 2026 Academy table are 100, 3000, 5000, 10000, or 30000. Lucky Looter and Salvager are the 10000 Core examples. Engineer, Jack-o'-Lantern, Mercenary, and Vampire are not in that price table, so do not type a guessed price for them.