How is expected attempts per level found?

For a level with success probability p, the expected number of attempts to succeed once is 1 divided by p. The tool multiplies that by the per-attempt cost to get the expected spend for that level.

Why does higher enchant cost so much more?

Success probability drops sharply at high enchant levels while the per-attempt cost rises, so expected attempts and total spend grow non-linearly. Going from +14 to +15 can cost more than the entire path up to +14.

Does failure reset my item?

This model assumes failure consumes the attempt cost but does not destroy or downgrade the item, so expected attempts is simply 1/p per level. Games with downgrade-on-fail need a heavier model.

How is the total computed?

The tool walks every level from your current to your target, computes expected attempts and cost for each, and sums them into a total expected currency budget plus a total expected attempt count.

Are these the real game rates?

The success curve here is a realistic descending-odds model common to enchant systems. Your specific title's rates may differ; use this to compare targets and budget conservatively.

League of Legends Enchant & Gear Score Calculator

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Budget your enchant path before you commit

Enchantment systems get punishing fast: each level has a lower success rate and a higher attempt cost than the last, so the spend to push the final few levels can dwarf everything before it. This calculator walks every step between your current and target enchant level and totals the expected attempts and currency so you can decide whether the upgrade is worth it.

How it works

Each enchant level has a success probability p and an attempt cost. For a single level, the expected number of attempts to succeed once (failures don’t destroy the item) follows the geometric mean:

expectedAttempts(level) = 1 / p(level)
expectedCost(level)     = expectedAttempts(level) × attemptCost(level)

To reach a target level the tool sums these across every step:

totalAttempts = Σ 1 / p(level)
totalCost     = Σ expectedCost(level)

Because p falls and attemptCost rises with level, the totals climb steeply — exactly the non-linear pain curve real enchant systems are known for.

Tips and example

Pushing an item from +10 to +12 where the odds are 45 percent and 30 percent gives expected attempts of about 2.2 and 3.3 respectively — manageable. But +14 to +15 at 8 percent success needs roughly 12 attempts on average, each costing far more, so that one step can exceed your whole earlier budget. Use the breakdown to stop at a sensible level, or to know exactly how much currency to farm before attempting the final push.