Unbreaking Enchantment in Minecraft: What It Does and How to Use It

Max level

III

Applies to

Nearly all tools, weapons, and armor

Incompatible with

Nothing

Obtained via

Enchanting table, anvil, villager trade

Unbreaking makes an item last longer by giving each use a chance to not consume any durability at all — and that chance is bigger for tools/weapons than for armor.

What Unbreaking actually does

Every time an item would normally lose 1 durability, Unbreaking rolls a chance for that loss to simply not happen. The odds differ by item category:

• Tools and weapons: a 100% ÷ (level + 1) chance the use actually costs durability. Unbreaking I = 50% chance (lasts ~2× as long), Unbreaking II = 33.33% chance (~3× as long), Unbreaking III = 25% chance (~4× as long).
• Armor: a 60% + 40% ÷ (level + 1) chance. Unbreaking I = 80% chance (~1.25× as long), Unbreaking II = 73.33% chance (~1.36× as long), Unbreaking III = 70% chance (~1.43× as long).

Armor's formula has a 60% floor baked in, which is why Unbreaking helps a tool's effective lifespan far more dramatically than it helps armor's — a tool goes from "costs durability every single use" to "costs durability 1 time in 4" at level III, while armor only ever gets down to "7 times in 10."

How to use it

Unbreaking III is close to a free addition on almost anything — it has no conflicts with any other enchantment, so there's essentially never a reason to skip it on a real build. The only real tradeoff is prior-work penalty cost on the anvil, not a mechanical downside.

Well-known builds that use it

Unbreaking is one of the standard enchantments on nearly every item build on this site — The Ideal Sword, Ideal Pickaxe, and Ideal Helmet all include it alongside their item-specific picks, and the same applies to every other tool/weapon/armor guide.

Frequently asked questions

Does Unbreaking III mean 75% less durability loss?

On tools and weapons, essentially yes — each use has a 25% chance of still costing durability (a 75% chance it doesn't), which works out to roughly 4x the effective lifespan. The exact math is a 100%÷(level+1) chance of losing durability, so level III gives 100%÷4 = 25%.

Does Unbreaking work the same on armor as on tools?

No — armor uses a different formula (60%+40%÷(level+1)) with a 60% floor, so Unbreaking III on armor only reaches a 70% chance of durability loss (about 1.43x lifespan) versus a tool's 25% chance (about 4x lifespan) at the same level.

Does Unbreaking conflict with anything?

No — Unbreaking has zero conflicts and stacks with every other enchantment, which is why it's standard on almost every build regardless of the item's other enchantments.