How is the number of attempts calculated?

Each level has a success probability, and the expected number of tries to clear that level is one divided by its success rate. The tool sums those expected tries across every level from your current one to the target.

Why does each level take more attempts than the last?

The success rate decays as the enchant level rises, so higher levels succeed less often and need more attempts on average. The per-level table shows exactly how the rate falls step by step.

What does item tier change?

Higher tiers raise the success-rate floor at high levels, so a legendary item keeps better odds deep into the upgrade path than a common one. That lowers the expected attempts and total cost for the same target level.

Does this model item destruction on failure?

No — this model assumes a failed attempt leaves the item at its current level and only costs materials. Systems that can downgrade or destroy items on failure would need more attempts than shown here.

How do I budget for an upgrade?

Multiply the expected attempts by your cost per attempt — the tool does this for you. Because the result is an average, keep a buffer of extra materials, since real runs vary around the expected figure.

Minecraft Enchant & Gear Score Calculator

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Pushing gear to a high enchant level can swallow far more materials than players expect, because success rates fall as the level rises. This tool estimates the attempts and total cost to reach your target so you can budget before you start.

How it works

Each upgrade step from level L to L+1 succeeds with a probability that decays as the level climbs, raised by a tier bonus. The expected attempts to clear a step is the inverse of its success rate:

successRate(L) = max(0.04, 0.98 − L × 0.07) + tierBonus × (L / 10)
attempts(L→L+1) = 1 / successRate(L)
total attempts  = Σ attempts over every level to target
total cost      = total attempts × cost per attempt

Because a failed attempt in this model keeps the item at its current level, you never lose progress — only materials — so the cost is the expected attempts times your per-attempt cost.

Example and notes

Going from +0 to +10 on an epic item shows the early levels clearing in roughly one try each, while the last few may need several attempts apiece, and the per-level table makes that ramp visible. Since the totals are averages, real runs swing either side of them — keep a buffer of spare materials so a bad streak does not strand a half-upgraded item.