Calculation
Formula and game rule
Tools lose durability with probability 1 ÷ (level+1). Armor uses 0.6 + 0.4 ÷ (level+1); expected uses equal durability ÷ loss probability.
Equipment
Durability Calculator
Estimate remaining uses with Unbreaking levels.
Durability CalculatorTry it now
Your Minecraft mission
- Expected uses
- 6244
- Extra expected uses
- 4683
- Item type
- Tool / weapon
Game rule: For most tools, Unbreaking level N gives an expected (N + 1)× durability.
Step-by-step guide
How to use the Durability Calculator
Enter the item's base maximum durability.
Choose tool or weapon versus armor, then set the Unbreaking level.
Compare expected total uses with the extra uses added by the enchantment.
Worked example
Example result
A 1,561-durability diamond pickaxe with Unbreaking III has an expected 6,244 uses, although actual results vary randomly.
What to check before using the result
- Expected uses are a statistical average, not a guaranteed lifespan for one item.
- Mending, special actions that consume extra durability and existing damage are outside this estimate.
Java and Bedrock Edition
The probability model targets modern vanilla mechanics shared by Java and Bedrock; special item behaviour should be verified per release.
This page is designed for players looking for a Minecraft durability calculator, Unbreaking calculator, expected tool uses. The calculator runs locally in your browser and updates without sending your world coordinates or command inputs to the server.
Common questions
Durability Calculator FAQ
Does Unbreaking III make every item last exactly four times longer?
For most tools that is the expected average, but random durability checks make individual lifespans vary.
Why is armor calculated differently?
Armor uses a separate durability-loss probability, so it receives less average extension than ordinary tools at the same level.