RO Codex: Ragnarok M Database & Build Tools

Original player guidance

Start with verified mechanics

Use the guides to make a build decision, then open the formula library when you need the exact order of operations, assumptions, and a worked example you can check.

All guides Formula library

Build guides

Practical routes from raw stats and effects to choices you can apply in game.

How damage is calculated A practical reading order for damage, including which inputs belong to the attacker, the skill, and the target. Planning equipment progression A method for choosing the next practical equipment upgrade instead of comparing only finished best-in-slot items. Worked build comparison: one upgrade at a time Walk through a controlled build comparison using a fixed skill, target, progression state, and decision log.

Mechanic references

Calculation order, qualified modifiers, worked arithmetic, and clearly stated limitations.

Physical damage pipeline A player-first reading order for physical hits without pretending every physical skill shares one universal formula. Auto Attack physical damage See why Bell Cranel’s forced-critical Auto Attack is recomputed through the physical-critical branch instead of multiplying his final non-critical result by Critical Damage. Magic damage pipeline A safe reading order for magical and verified hybrid skills, with family-specific ordering kept explicit.

Player tools

Plan a build, calculate a cost, or test an encounter.

Sign in

Ymir's Notebook Save a complete character build with stats, gear, skills, runes, and account bonuses.

Public preview

MVP Battle Lab Test a build, support setup, and skill rotation against an MVP encounter.

Refine Calculator Calculate safe-refine copies, materials, and Zeny from +1 to +15.

Handbook Bonuses Sign in Job Unlocks Sign in Guild Blessing Tracker Sign in

How RO Codex earns trust

Every useful page should answer a player question, preserve the conditions behind each value, and make uncertainty visible.

Maintained for players

The RO Codex Team maintains the database, calculators, and editorial explanations as one player-focused reference.

About the project

Evidence before publication

Names, mechanics, relationships, examples, and limitations are checked before a page is included in search.

Read the standards

Corrections are welcome

A page link, expected behavior, and reproducible in-game evidence help us investigate and correct issues.

Report an issue

Game database

Client-sourced records for the things you use and fight.

Jobs Classes, advancement paths, stats, and unlocks. Skills Levels, formulas, effects, conditions, and targets. Items Equipment, consumables, materials, and effects. Cards Card effects, artwork, and source monsters. Monsters Stats, race, size, element, maps, and drops. Pets Pet stats, skills, taming, and adventure rewards. Mounts Mount requirements, movement, and client artwork. Exchange Browse tradeable items and their Exchange records.

Character systems

Look up the systems that change a build.

Skill Runes Rune effects and the skills they modify. Attribute Runes Attribute lines, values, and progression. Arcane Runes Arcane effects, requirements, and combinations. Inheritance Skills Inheritable skills, slots, and prerequisites. Frostcore Crystals, stat inheritance, and class effects. Oracle Mirror Mirror attributes, unlocks, and stat effects. Ancient Relics Relics, shards, effects, and unlock conditions. Sakray Memory Memory equipment and their effect pools.

World & progression

Find where to go, what to clear, and what to improve.

Maps Map connections, monsters, NPCs, and locations. Quests Searchable walkthroughs with map context. Instances Encounter mechanics, requirements, and rewards. Guild Systems Blessings, artifacts, buildings, and progression. Furniture Housing furniture and first-craft bonuses. Player Guides Mechanic explanations and build references.