Scroll Calculator
Outcome odds using Classic World scroll tiers.
Average gain (if not boomed)—
Average passes (if not boomed)—
Chance all pass—
Boom chance—
Average scrolls used—
Average cost—
Odds by number of passes
Odds by tier
| Tier | Success | Boom on fail |
|---|---|---|
| Lesser | 100% | — |
| Intermediate | 60% | — |
| Greater | 10% | — |
| Chaos | 10% | 50% |
Gains by type
| Type | Lesser | Intermediate | Greater | Chaos | Expected gain per scroll |
|---|---|---|---|---|---|
| Standard (Gloves ATT, STR/DEX/INT/LUK, ACC, Speed, Jump, Avoid, Crit) | +1 | +2 | +3 | +4 | L 1 · I 1.2 · G 0.3 · C 0.4 |
| Defense, Gloves Magic ATT, Cape Magic DEF | +2 | +4 | +6 | +8 | L 2 · I 2.4 · G 0.6 · C 0.8 |
| HP & MP (hat, top, bottom) | +10 | +15 | +20 | +25 | L 10 · I 9 · G 2 · C 2.5 |
- Weapon ATT and wand/staff Magic ATT gains differ by source: MS-Classic lists weapons +1/+2/+4/+5 and wands/staves +2/+4/+8/+10, while MapleClassic Wiki lists weapons +1/+2/+3/+4 and wands/staves +2/+4/+6/+8. Use custom gains for these.
- Whether a failed scroll uses an upgrade slot is not recorded in the client data, so this calculator works from the number of scrolls you apply.
Sources: MS-Classic (2026-10-22) · MapleClassic Wiki