Classic World Formulas

Accuracy, avoid and the hit check

Base accuracy per class (Magicians use INT where others use DEX). Each result rounds down; gear and skills add on top.

Avoid: floor(LUK / 3) + floor(DEX / 6) + 5

Hit check:

1. If the monster is L levels above you: scaled ACC = ACC × 100 / (10 × L + 255) (L = 0 at or above its level).
2. Spread: 0.15 + 0.20 / (1 + e^(D / 12)), where D = scaled ACC − monster avoid.
3. Hit if scaled ACC × a random number between (1 − spread) and (1 + spread) reaches the monster's avoid.

Spells use the same check, so Magicians can miss. How a monster's accuracy works against your avoid is not confirmed for Classic.

Guide: accuracy and hit rate · Tools: accuracy calculator, avoidability calculator

Damage

Physical

• MAX = Skill% × W.ATK × (1.0 + (Main × Multiplier + Secondary + 2 × Attack Power) / 100)
• MIN = Skill% × W.ATK × (0.8 + (Main × Multiplier × Mastery + Secondary + 2 × Attack Power) / 100)
• Mastery factor = (0.1 + mastery level / 10) × 0.7: 7% with no mastery skill, 77% at mastery level 10. Mastery only raises your minimum.

Magic

• Magic total = floor(INT / 2) + Magic Attack
• MAX = Skill% × Magic total × (1 + INT / 125)
• MIN = Skill% × Magic total × (1 + INT × Mastery / 125)

Then, on the monster:

1. Defense: damage × 100 / (defense + 100)
2. Element: × 1.25 weak, × 0.75 strong, × 0 immune
3. Level gap (monster D levels above you): ÷ (D² × 0.005 + 1) when D < 10, ÷ (D × 0.05 + 1) at 10+
4. Crit: × (1 + crit damage)
5. Cap: rounded down, kept between 1 and 99,999 per hit

Weapon multipliers (by animation; melee swings about 60% of the time and stabs 40%):

Lucky Seven uses 3.0 instead of the claw's 2.5.

Guide: damage formula explained · Tools: damage calculator, one-hit calculator, skill damage table

EXP table, death and party

The EXP table comes straight from the game data (levels 1–99; 100 is the cap). One community source writes it as four formulas, and our guide checked that they reproduce all 99 values:

Level 1 to 30 is 548,637 EXP; level 1 to 100 is 18,194,778,397.

• Death: up to 10% of your current level's EXP, never a level. A Safety Charm prevents it. A LUK-based model exists but has only one source.
• Party bonus: exists, but the exact numbers aren't official and sources disagree.

Guides: EXP table, death and EXP loss · Tools: EXP calculator, grind tracker

Scroll success rates

• Expected gain per scroll = bonus × success rate. Intermediate beats Lesser on every ladder except HP/MP.
• Chaos: each attempt has a 45% chance of losing the item (90% fail × 50%).

Guides: scroll tiers explained, scrolling guide · Tool: scroll simulator

HP and MP per level

Fixed gains, no RNG, and INT doesn't add MP. 2nd job paths use their base class rates. Max HP / MP Increase is a flat % of your pool (up to +25%), so old-style HP washing doesn't work.

Guide: HP and MP gain explained

Stats and AP

• No dice: every stat starts at 4, plus 9 free AP (25 total at level 1).
• +5 AP per level: total AP = 25 + 5 × (level − 1).
• Community data: STR adds weapon defense (floor(STR / 4)), INT adds magic defense (floor(INT / 4)).

Guide: starting stats and AP · Tool: skill planner

Attack speed

Lower number = faster. In the game data, Faster is 2 or 3, Fast is 4 or 5, Normal is 6, Slow is 7 or 8. Booster takes 2 off and must match your weapon. Community testing says Magician spells ignore weapon speed.

Guide: attack speed and weapon reach