From Melvor Idle
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Each skill action has a Mastery Level associated with it that gains experience each time that skill action is performed. The Mastery Levels earned give bonuses to that specific action. Each successful skill action earns 1 experience point towards that actions Mastery Level. For example, making an Iron Dagger (item).svg Iron Dagger with Smithing (skill).svg Smithing would earn 1 experience point towards Iron Dagger (item).svg Iron Dagger Mastery Level. When an action fails, like burning Food, catching junk while fishing, unsuccessfully pickpocketing, or when crops die, no mastery experience will be given. Lighting fires for Cooking (skill).svg Cooking and Firemaking (skill).svg Firemaking will not give mastery experience and neither will planting, composting or destroying herbs, trees, and allotments.

Mastery experience for Fishing (skill).svg Fishing and Farming (skill).svg Farming functions differently to other skills. Fishing (skill).svg Fishing Mastery XP is based on the number of fish caught, at a rate of 1 Mastery XP per fish. For Farming (skill).svg Farming, Mastery XP is based on the amount of harvested resources (e.g. harvesting 26 carrots from 1 plot will yield 26 Mastery XP).

Mastery tokens can be claimed from the bank to earn a random mastery level for their corresponding skill.

Each skill page has information on what bonuses are associated with that skill.

Mastery Level Calculation

The mastery xp required, [math] X_n [/math], for a given level, [math] n [/math], can be calculated as follows:

[math]X_n = \begin{cases} 0 & n=1 \\ \left \lfloor \sum_{i=1}^{n-1}\frac{\left \lfloor i+300(2^{\frac{i}{7}}) \right \rfloor}{48} \right \rfloor + 1 & n\geq 2 \\ \end{cases}[/math]

where: [math] \left \lfloor x \right \rfloor [/math] is the floor function.

Melvor Idle version v0.19.2 (Released: 1st April 2021)
Attack (skill).svg Attack
Strength (skill).svg Strength
Defence (skill).svg Defence
Hitpoints (skill).svg Hitpoints
Ranged (skill).svg Ranged
Magic (skill).svg Magic
Prayer (skill).svg Prayer
Slayer (skill).svg Slayer
Woodcutting (skill).svg Woodcutting
Fishing (skill).svg Fishing
Firemaking (skill).svg Firemaking
Cooking (skill).svg Cooking
Mining (skill).svg Mining
Smithing (skill).svg Smithing
Thieving (skill).svg Thieving
Farming (skill).svg Farming
Fletching (skill).svg Fletching
Crafting (skill).svg Crafting
Runecrafting (skill).svg Runecrafting
Herblore (skill).svg Herblore
Agility (skill).svg Agility
Alternative Magic (skill).svg Alternative Magic
Other:Man (thieving).svg Beginners Guide Guides.svg Guides Bank Slot (upgrade).svg Bank Combat.svg Combat Mastery.svg Mastery Coins.svg Money Making Shop.svg Shop Easter.svg Easter Eggs Finn, the Cat (pet).png Pets Golden Golbin (pet).svg Golbin Raid
Reference Tables: Items, Equipment, Experience Table, Upgrading Items, Dungeons, Chest Loot Tables, Monsters, Monster Loot Tables