Minecraft enchantment calculator_

How anvil costs work

Every anvil combine costs levels from three sources, added together. First, the prior-work penalty of the left item: 2ⁿ − 1 where n is how many times it has already been through an anvil. Second, the same penalty for the right item (the sacrifice). Third, for every enchantment on the sacrifice, its final level × multiplier, where the multiplier is the item value when you sacrifice another tool or armor piece and the (usually half price) book value when you sacrifice an enchanted book. The result's prior-work count becomes the larger of the two inputs plus one, so each combine makes the next one pricier.

Renaming adds 1 level; repairing with raw material adds 1 per unit used. The calculator ignores durability (it assumes undamaged pieces), which is the common case when you are building a fresh set.

Why order matters

Take a fresh sword and three books: Sharpness V, Unbreaking III and Mending. Applied one after another the sword pays 5, then 3 + 1 (penalty 1), then 2 + 3 (penalty 3): 14 levels. Now try "books first": Sharpness + Unbreaking costs 3 (book multiplier 1 × III), adding Mending to that stack costs 2 + 1 = 3, and applying the finished book to the sword costs 5 + 3 + 2 plus the book's penalty of 3: 13. Total 19. Same enchantments, five levels more, because the expensive penalty landed on the side that carries the most enchantment cost. The optimizer tries every pairing (it is a full search, not a greedy rule) so you never have to reason about it by hand, and it reports a second plan that ends with the lowest prior-work count when that differs from the cheapest.

The 39-level limit and how to avoid it

In Java survival the anvil refuses any single operation of 40 levels or more and shows "Too Expensive!". 39 is the most one step may cost. Because penalties double with each use, an item that has been combined six times carries a 63-level penalty by itself and can never be enchanted again outside creative mode. To stay under the cap: prefer books over spare items (half the multiplier), keep the tree balanced so no piece accumulates more than 3 or 4 uses, put the high-multiplier enchantments (Thorns, Silk Touch, Infinity, Soul Speed, Swift Sneak, the curses at 8/4) onto pieces with zero or one prior use, and add cheap 1-multiplier enchantments like Sharpness, Efficiency, Power or Protection last. Note that level counts, not enchantment count: Protection IV on a book costs 4, Thorns III on a book costs 12. The calculator searches cap-free orders first and only falls back to a flagged plan when none exists.

Enchantment multipliers: item vs book

The per-level cost of every enchantment, from the Minecraft Wiki's anvil mechanics page for Java and Bedrock 1.21. "Item" is charged when the sacrifice is a tool or armor piece, "Book" when it is an enchanted book. Books are never worse and usually half price, which is why villager trading and fishing for books is the cheap route. The calculator uses exactly this table.

Enchanting table levels by bookshelf count

The table rolls a base value of 1–8 + floor(shelves / 2) + 0–shelves, then derives the three slots: top is max(base / 3, 1), middle is base × 2 / 3 + 1, and bottom is max(base, shelves × 2). That last rule is why the bottom slot is locked to exactly 30 with 15 shelves and why you need all 15 for a guaranteed level-30 option. Only shelves one block away from the table, with an air (or carpet, torch, or similar non-blocking) gap between, are counted.

Java vs Bedrock differences

Both editions share the penalty table, the multipliers and the bookshelf formula. The differences that change your plan: Bedrock has no "Too Expensive" cap, so a heavily used item just costs more; Sweeping Edge does not exist in Bedrock; and Java adds one extra level for every incompatible enchantment on the sacrifice (the calculator blocks those combinations entirely, so that surcharge never appears). Bedrock also lets you see the exact cost before you commit, which the tool effectively gives Java players too.

Pick the enchantments first

Not sure what to put on the item? Start with our picks for the best sword enchantments, best armor enchantments and best pickaxe enchantments, then paste the list into the optimizer. Running a server and want custom enchantments beyond vanilla? See how to add plugins for enchant plugins on Paper, or modded server hosting for mods that add entirely new ones.

Enchanting on a server with friends? Yours is live in about 30 seconds, free for 2 days. Start a SpawnFort server.