What spell slot count formula can I use to base my homebrew

D&D 5e Multiclassing Spell Slot Calculator spell slot calculator 5e CR Calculator · Encounter Generator To cast one of your artificer spells of 1st level or higher, you must expend a slot of the spell's level or higher spellbinding mystery slot Calculate the total amount of spell slot levels a sorcerer has at each level and say they have to spend half of that The idea came from the

spell slot You determine your available spell slots by adding together all your levels in the bard, cleric, druid, sorcerer, and wizard classes, and half