How does failure setback change the maths?

If a failure keeps your level, expected attempts per level is simply one over the success rate. If a failure drops a level, you re-fight the level below it, which raises expected attempts. The tool models both with a recurrence over levels.

Why do high enchant levels cost so much more?

Success rate falls as the level rises, so each step takes more attempts on average, and with downgrade-on-fail you often lose progress. Expected cost grows faster than linearly, which is why the last few levels dominate the total.

How is expected cost computed?

Expected attempts to cross a level is one over its success rate (adjusted for setback). Multiplying by the per-attempt cost and summing across all levels from current to target gives the total expected material cost.

Are these the exact game rates?

The default rate curve declines smoothly from easy low levels to hard high levels, which mirrors most enhancement systems. Override the base and decay fields to match your game's published success table for exact numbers.

What if my gear can shatter on failure?

Choose the shatter option and the tool treats a failure as a total loss, so expected cost includes rebuilding from the floor. This is the most punishing mode and shows why protection items are worth using on high enchants.

Monster Hunter Enchant & Gear Score Calculator

Email me this result

Get this tool's output sent to your inbox, plus one useful tool a week. No spam, unsubscribe any time.

Pushing gear to a high enchant level can drain your materials fast if the odds turn against you. This calculator models the declining success curve, the cost per attempt, and what happens on failure — stay, downgrade, or shatter — to give the expected number of attempts and total material cost to reach your target.

How it works

Each level has a success rate that declines with level. Expected attempts to cross one level depend on the failure rule:

stay:       attempts = 1 / successRate
downgrade:  attempts = (1 + failRate × attempts(level−1)) / successRate
shatter:    attempts = 1 / successRate, but cost re-adds lower-level rebuild

Total expected cost sums per-level attempts × cost per attempt from your current level up to the target.

Example and tips

Going from level 5 to level 10 with a stay-on-fail rule and a smoothly declining rate might average a handful of attempts at the low end but many at the top, because the rate drops with each level. Switching to downgrade-on-fail roughly multiplies the cost of the hardest levels. Bank protection or guarantee items for the final levels — that is where almost all of the expected cost lives.