Tools

Jujutsu Zero Spin Calculator

Use this calculator to estimate how many spins/rolls you need to reach 50%, 90%, or 99% odds for a drop. Great for planning rerolls before you spend your currency.

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Spin Calculator

Calculates how many rolls you need for a target chance. Assumes independent rolls (no pity/guarantee).

Codes last updated: Jan 4, 2026

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Quick plan (based on today's codes)

Active codes currently include 325 Clan Rolls and 60 Clan Spins (total attempts: 385).

Pick a goal

Target chance

Rolls needed at this rate: 920

Short by (with your rolls): 535

Using your rolls

61.85%

Chance to hit at least once.

Using today's active codes total

61.85%

Inputs

Drop rate (%)Chance per roll: 0.25%Quick presetPresets match common clan rarity buckets (rates can change per update).Rolls available

Tip: rolls and spins are treated the same here (one roll = one independent try).

Results

Chance to hit at least once

61.85%

Formula: 1 − (1 − p)ⁿ

Expected rolls (mean)

400

Geometric: E[N] = 1 / p

Expected successes

0.96

Binomial mean: n × p

Rolls needed for a target chance

Target

50%

Rolls needed

277

Target

75%

Rolls needed

554

Target

90%

Rolls needed

920

Target

95%

Rolls needed

1,197

Target

99%

Rolls needed

1,840

Note: If the game has pity/guarantees, the real rolls needed can be lower than this.