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Star Force Calculator
Expected meso cost, expected booms, and per-star rates for a MapleStory (GMS) ordinary Star Force upgrade — no character import needed.
Level 200 · caps at 30★
Item
Options
31.30B
Star Force cost
tapping
0
Replacement cost
set a spare price
7.25
Expected booms
Total 31.30B · 17★ → 22★
Per-star breakdown
| Star | Protect | Success | Boom | Cost |
|---|---|---|---|---|
| 17★ → 18★ | — | 15.8% | 6.7% | 1.48B |
| 18★ → 19★ | — | 15.8% | 6.7% | 3.33B |
| 19★ → 20★ | — | 15.8% | 8.4% | 7.06B |
| 20★ → 21★ | — | 31.5% | 10.3% | 4.55B |
| 21★ → 22★ | — | 15.8% | 12.6% | 14.88B |
Try it — Star Force tapping
Just for fun — real per-attempt odds.
Safeguard
taps 0
booms 0
spent 0
next: 32% up · 2% boom
Regular-server Star Force cost, using the same rates as the planner. Star Force cost is tapping; replacement cost is expected booms × your spare-item price (leave it 0 to see tapping alone). Superior, Zero, and Reboot use different tables.