MapleStory M Damage Calculator
Enter your stats from the in-game stat window to see your mob and boss damage side by side — normal, critical and average per hit, with the level penalty, boss defense and food buffs factored in. Test a stat change before you spend mesos; your inputs are saved in your browser.
NormalNormal monsters — average hit
1954587
(+3.06% · +59,891)635,972 – 2,689,527
Normal
635972
(+1.84% · +11,721)Critical
2530534
(+2.10% · +53,115)BossBoss — average hit
1831314
(+3.60% · +66,004)595,862 – 2,519,902
Normal
595862
(+2.38% · +14,162)Critical
2370937
(+2.63% · +62,449)Boss damage breakdown
Character setup
My stats
Physical class
Input base stats here. Exclude any food buffs & party buffs. Include self buffs.
Skill
Nodes
Final Def Ignore Rate: 2.40% — sources stack multiplicatively, then reduce the boss's defense (PDR).
Target
These only affect the boss damage — mob damage skips the level and defense reductions.
Modifiers
Hyper skill bonuses only, stacked on top of your base stats. Self and party buffs belong in your base stats; food gets its own section.
Food
Regular food buffs are mutually exclusive per effect — picking a second food of the same stat replaces the first. Different stats can be combined.
These stack with the regular buff and with each other.
Stat efficiency
What a new line would actually buy you. Each row raises one stat in your stat window and shows the damage you gain — so before you cube, flame or swap an emblem, you can see which line is worth chasing. Set a step to the value you might roll and read the two columns.
| Stat | Gain | Normal monsters | Boss |
|---|---|---|---|
| Phys Atk | + | +0.27% | +0.27% |
| Phys Atk | +% | +0.45% | +0.22% |
| Phys Dmg | +% | +0.44% | +0.44% |
| Boss Atk | +% | — | +0.51% |
| Crit RateBest | +% | +0.97% | +0.97% |
| Crit Dmg | +% | +0.23% | +0.23% |
| Final Dmg | +% | +0.66% | +0.66% |
| Def Ignore Rate | +% | — | +0.25% |
Worked out from your base stats only — food and hyper skill bonuses are left out, because a reroll changes your stat window, not the buffs on top of it. Each row re-runs the full formula with that one stat raised; the brackets multiply each other, so these numbers shift as your gear does. They compare stats at a fixed step, not what it costs to get there.
More tools
Nexon's official flame tables, made interactive. Pick the options you want and see your real chance per flame — and how many flames it takes to get there.
Cube probabilities →Potential and bonus potential odds for every equipment part and rank, with the cubes needed to hit the lines you want.
Guide
- How is damage calculated in MapleStory M?
- A hit is Attack × (1 + Damage %) × (1 + Attack %) × Skill % × (1 + Final Damage %). Against bosses, Boss Attack % × Skill % is added into the Attack % bracket, and the result is further reduced by the level-difference modifier and the boss's defense (PDR) after your Ignore Defense. The formulas come from the community Damage & Emblem Calculator spreadsheet, verified by in-game testing and datamined defense values.
- Why is my boss damage so much lower than my mob damage?
- Two reductions apply only to bosses: a level-difference modifier based on datamined defense ratings (fighting above your level cuts damage hard), and the boss's defense (PDR), which removes a share of your damage unless you stack Def Ignore Rate. Expand 'Boss damage breakdown' in the results card to see each stage.
- Should I prioritize Critical Rate or Critical Damage?
- They scale off each other: Critical Damage does nothing without Critical Rate, and vice versa. Crits also roll a random 0–50% bonus on top of your Crit Damage — the calculator shows the min, midpoint and max of that roll. Compare your average hit before and after a stat change to decide.
- How does Def Ignore Rate (IED) work?
- Def Ignore Rate shrinks the damage reduction from a boss's defense (PDR). Sources stack multiplicatively, not additively: your stat window DIR, Node IED (+15% once the skill's node reaches Lv 40) and Defense Smash 4 (+25%) combine as 1 − (1−a)(1−b)(1−c).
- Which stat gives me the most damage?
- There is no universal answer — the damage brackets multiply each other, so the stat you have least of is usually worth the most. The Stat efficiency table answers it for your build: it raises one stat at a time and shows the resulting % damage increase against mobs and bosses, so you can compare a flame, a potential line and an emblem on the same scale.
- Do food buffs stack in MapleStory M?
- Regular food buffs are mutually exclusive per effect — eating a second food of the same stat replaces the first, though different stats combine. A few special items (Boss Rush Boost Potion, Noodle Soup With Mushroom, Stir-Fried Pork, Escargot, Cold Jellyfish Salad) stack with the regular buff and each other. The Food section models exactly this.