MapleStory Classic Accuracy Guide: Formula, Hit Rate, ACC Targets

Quick summary

• Every class has its own accuracy formula. henesys.gg's client data gives Warriors the most accuracy per DEX. Magicians use INT instead of DEX and get the least per point.
• Monsters above your level get harder to hit fast. By henesys.gg's formula, each level a monster has over you raises the accuracy you need by about 4%. Out-leveling a monster gives no discount.
• Use the table below. It lists the accuracy for 100% hits on 37 training mobs and bosses, at the monster's level, 5 levels below, and 10 levels below (our arithmetic from henesys.gg's formula and monster data).
• Ways to get accuracy: DEX (or INT for Magicians), Precise Strikes, Focus, Nimble Body, Sniper and Supreme Sniper Potions, and accuracy scrolls (our class guides, citing NiaMeowDB and planet-helper).
• Sources disagree on magic. henesys.gg and NiaMeowDB say spells use the same hit check. The MapleClassic Wiki says magic "never miss[es]."

Checked against the Founder's Access build on October 13, 2026. Grand Launch is October 21, 2026; see the end of the guide for what may change.

Calculate your accuracy

Class	Base accuracy (henesys.gg)	Per DEX/INT	Per level	Per LUK
Warrior	(1.2 × DEX + 2 × Level + 0.6 × LUK) / 2.5 + 10	0.48	0.80	0.24
Magician	(1.2 × INT + 2 × Level + 0.6 × LUK) / 5.1 + 20	0.24	0.39	0.12
Bowman	(1.2 × DEX + 2 × Level + 0.6 × LUK) / 4.8 + 20	0.25	0.42	0.13
Thief	(1.2 × DEX + 2 × Level + 0.6 × LUK) / 4 + 15	0.30	0.50	0.15
Beginner	(1.2 × DEX + 2 × Level + 0.6 × LUK) / 2.5 + 5	0.48	0.80	0.24

The per-point columns are our arithmetic from the formulas. Stats are totals, including gear and buffs. Accuracy from gear and skills is added on top. planet-helper uses the same Warrior, Bowman, and Thief formulas, and NiaMeowDB uses the same Warrior formula. Our Magician guide gives the same per-INT and per-level values.

Example (our arithmetic): a level 30 Warrior with 25 total DEX and 4 LUK has (30 + 60 + 2.4) / 2.5 + 10 = 47 accuracy. That's 100% on Zombie Mushrooms at level 24 and up, but not on Wild Boars (50).

Planner tip: planet-helper notes that "your stat window already adds gear and buffs, so entering total accuracy is the accurate way." The DEX/LUK mode is only an estimate.

Understand the hit roll

henesys.gg's formula from the launch client:

• Base chance = Accuracy × 100 / ((max(0, D) × 2 + 51) × 5), where D is the monster's level minus yours
• Spread = 0.15 + 0.2 / (1 + e^((Base chance − Monster avoid) / 12))
• Hit if a random number from (1 − Spread) to (1 + Spread), times Base chance, is at least the monster's avoid

What this means in practice (henesys.gg):

• Each level the monster has over you raises the accuracy needed "by about 4%."
• Being above the monster "gives no discount."
• A monster with 0 avoid "is never missed."
• Debuffs like Threaten, Slow, and Seal skip this check and use their own success rate.

When your accuracy is close to the monster's avoid, the spread widens. Hit rate drops off gradually instead of all at once, so a small accuracy gain can matter a lot near the line.

Hit your target mobs

Accuracy for 100% hits, rounded up to whole points. This is our arithmetic using henesys.gg's formula and its launch-client monster levels and avoid. It matches henesys.gg's calculator to within 1 point and NiaMeowDB's published targets (27, 44, 47, and 56 for Zombie Mushroom at level 19).

Monster	Level	Avoid	At its level	5 levels below	10 levels below
Octopus	12	7	24	29	33
Green Mushroom	14	8	27	33	38
Blue Mushroom	19	11	37	44	52
Mano (boss)	20	13	44	52	61
Stirge	20	13	44	52	61
Horny Mushroom	22	13	44	52	61
Zombie Mushroom	24	14	47	56	65
Wild Boar	25	15	50	60	70
Evil Eye	27	16	54	64	74
Iron Hog	28	17	57	68	79
Fairy	29	20	66	79	92
Ligator	31	21	70	83	97
Fire Boar	32	21	70	83	97
Curse Eye	33	22	73	87	101
Jr. Wraith	34	25	82	98	114
Jr. Boogie 1	35	26	86	102	119
Lupin	37	27	89	106	123
Lorang	38	24	79	95	110
Cold Eye	40	25	82	98	114
Mushmom (boss)	40	29	95	114	132
Zombie Lupin	41	29	95	114	132
Copper Drake	45	28	92	110	128
Tortie	46	25	82	98	114
Shade (boss)	48	35	114	136	158
Wraith	48	32	104	125	145
Clang	49	30	98	117	136
Drake	50	27	89	106	123
Croco	52	31	101	121	141
Malady	55	33	108	129	150
Zombie Mushmom (boss)	55	37	120	144	167
Stone Golem	56	30	98	117	136
Dark Stone Golem	58	31	101	121	141
Red Drake	60	35	114	136	158
Wild Kargo	62	36	117	140	163
Tauromacis	70	41	132	158	184
Taurospear	75	48	154	184	214
Jr. Balrog (boss)	80	49	157	188	219

How to read it: at your own level, the 100% target is roughly 3.3 × the monster's avoid. Fighting 10 levels below adds about 40% (our arithmetic). That's why our training guide sends you to mobs at or below your level.

First hits come earlier: you start landing some hits at roughly 60% of the 100% target (our arithmetic from the same formula). A level 30 Bowman hits Jr. Wraith 40% of the time without Focus, according to planet-helper (via our Bowman guide).

Add accuracy from every source

Source	Accuracy	Class	Cited in
Precise Strikes	+5 → +20 (master 15)	Warrior	Warrior guide (planet-helper launch data)
Focus	+1 → +20 (also evasion)	Bowman	Bowman guide
Nimble Body	+1 → +15 (also avoid)	Thief	Thief guide
Sniper Potion	+5 for 10 min	All	Potions guide
Supreme Sniper Potion	+7 for 15 min (Raymond, Henesys citizenship)	All	Warrior and potions guides
Hat, shield, gloves, cape scrolls	Accuracy is one option on each	All	Scrolling guide
More DEX (INT for Magicians)	See the per-point column above	All	henesys.gg

• Warriors: planet-helper says Level 15 Blue Mushrooms are 0% hit without Precise Strikes. It also notes that early footage showed +50 at max, but the launch data says +20. See our Warrior guide.
• Thieves: Nimble Body is part of both main skill orders in our Thief guide.
• Scrolls: see our scrolling guide. Pia's Blue Mushroom quest gives a random hat accuracy scroll.
• Potions: compare value in our potions guide.

Choose how to close an accuracy gap

Method	Cost	Best when
Train one map lower	Slower kills	Your gap is more than 10 points
Accuracy potion	Mesos per use	Short sessions and boss attempts
Accuracy skill	SP	You're the class that gets one
Accuracy scrolls	Mesos and scroll luck	Long-term gear
Extra DEX in AP	Damage you give up	Only up to the target your build needs
Level up	Time	You're 1–3 levels under the mob

Our class guides cite NiaMeowDB's rule: add only enough DEX to meet each weapon's requirement once gear is counted. That's another reason to use potions and skills instead of AP to cover accuracy gaps.

Know how avoid protects you

• Your avoid = floor(LUK / 3) + floor(DEX / 6) + 5 (henesys.gg).
• Monsters always have a chance: a failed dodge roll still lands 8% of the time, so no amount of avoid drops a monster's hit chance below 8%.
• Hard cap: "effective Avoid never passes 80."
• Out-leveling cuts both ways: it lowers the monster's hit score and your effective avoid.
• Magic attacks: our bosses guide cites metaroad saying Jr. Balrog's mostly magic attacks ignore avoid, so HP is your only defense.

Avoid the common mistakes

• Taking a training map's level at face value. Compare its avoid against the table instead.
• Fighting mobs well above your level "on paper." The MapleClassic Wiki's example: a level 50 Assassin with 89 accuracy hits a Red Drake (level 60, avoid 34) only about 14% of the time.
• Adding DEX past your weapon's requirement when a potion or skill would cover it.
• Forgetting that a miss wastes the potion, arrow, or star that went with it (planet-helper). For Warriors, it still costs full MP (NiaMeowDB, via our Warrior guide).
• Trusting one calculator without checking which model it uses.

Plan for returning players and alts

• Veterans: henesys.gg says the EXP table matches pre-Big Bang GMS through level 89. None of our sources says the same about accuracy, so use the Classic formulas above instead of what you remember.
• Alts: use your stat window's total accuracy in any calculator instead of estimating from DEX (planet-helper).
• Powerleveled characters often reach a level before their gear and AP catch up. Check your accuracy against the table before picking a map. Our powerleveling page shows what a service includes.

Want a hand with this?

If you would rather skip the grind that goes with this, MapleStory Classic powerleveling services are listed on FullBoosts. Read Nexon's Terms of Service before you buy any service from anyone, FullBoosts included — a marketplace listing isn't publisher permission.

What may change at Grand Launch

This guide describes the Founder's Access build as it was on October 13, 2026. Re-check these against Nexon's Grand Launch notes on October 21: whether crafting still stops at craft level 8, whether Forgotten Hollow, Orbis and third jobs stay closed, KPQ channel limits, NPC shop stock, and any Founder's Access-only events or packages mentioned here. Nothing here assumes a closed area or feature will open.

FAQ

How is accuracy calculated in MapleStory Classic? By class: for example, Warrior = (1.2 × DEX + 2 × Level + 0.6 × LUK) / 2.5 + 10 (henesys.gg, from the client). By class: for example, Warrior = (1.2 × DEX + 2 × Level + 0.6 × LUK) / 2.5 + 10 (henesys.gg and NiaMeowDB, from the client).

How much accuracy do I need to never miss? About 3.3 × the monster's avoid at equal level, plus about 4% per level it has over you. See the table.

Do Magicians miss? henesys.gg and NiaMeowDB say spells use the same hit check. The MapleClassic Wiki says magic never misses. Test it in-game.

Does being higher level than the monster help? Not for accuracy. Out-leveling gives no discount (henesys.gg).

What's the fastest accuracy fix? A Sniper or Supreme Sniper Potion (+5 or +7) or your class skill (our class guides).

Can I avoid every hit with enough avoid? No. Monsters land at least 8% of the time, and effective avoid caps at 80.