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Skill v1.0.0

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ailiujiarui/mineai/crafting-and-smelting
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version: "1.0.0" name: crafting_and_smelting description: Minecraft 1.21.1 crafting and smelting facts - the 2x2 and 3x3 grids, the recipes the early game runs on, armor and tool costs, furnace / blast furnace / smoker differences, fuel burn values, what a furnace's slots and progress numbers mean, and the workstation blocks.


Crafting and smelting (1.21.1)

Grids

  • The inventory grid is 2x2: planks, sticks, a crafting table, torches and anything else that fits in 2x2 can be made anywhere.
  • A crafting table gives a 3x3 grid; most tools, armor and machines need it.
  • Shaped recipes keep their pattern but can sit anywhere in a larger grid (a 2x2 recipe works in any 2x2 corner of the 3x3); shapeless recipes only care about the ingredients.

The early-game chain

ItemRecipeNotes
Planks1 log → 4 planksAny wood type; stripped logs and wood work too
Sticks2 planks (stacked) → 4 sticks
Crafting table4 planks (2x2)
Chest8 planks (ring)
Furnace8 cobblestone, cobbled deepslate or blackstone (ring)
Torch1 coal or charcoal over 1 stick → 4 torches
Wooden / stone / iron / diamond pickaxe3 material over 2 sticksMaterial = planks, cobblestone (or cobbled deepslate, blackstone), iron ingots, diamonds
Sword2 material over 1 stick
Axe3 material + 2 sticks
Shovel1 material + 2 sticks
Bucket3 iron ingots (V shape)Carries water, lava, milk, powder snow, fish
Shield6 planks + 1 iron ingot
Flint and steel1 iron ingot + 1 flint (shapeless)Flint: 10% of gravel broken without Silk Touch
Bow3 sticks + 3 string
Arrow1 flint, 1 stick, 1 feather (column) → 4 arrows
Bed3 wool (same colour) over 3 planks
Ladder7 sticks (H shape) → 3
Boat5 planks (U shape)
Bread3 wheat (row)
Iron block / gold block / diamond block9 of the item; and back to 9Compact storage
Blast furnace5 iron ingots + 1 furnace + 3 smooth stone
Smoker1 furnace + 4 logs
Smithing table2 iron ingots over 4 planks
Anvil3 iron blocks + 4 iron ingots
Enchanting table1 book + 2 diamonds + 4 obsidian
Brewing stand1 blaze rod over 3 cobblestone
Eye of ender1 ender pearl + 1 blaze powderBlaze rod → 2 blaze powder

Armor cost and protection

PieceMaterial costIronDiamond
Helmet52 armor3 armor
Chestplate868
Leggings756
Boots423
Full set241520 (+8 toughness)

Leather totals 7, gold 11, chainmail 12 (chainmail cannot be crafted), netherite 20 with 12 toughness and knockback resistance. Netherite is not crafted directly: diamond gear is upgraded at a smithing table (see the_nether).

Smelting

BlockSmeltsTime per item
Furnaceeverything smeltable10 s (200 ticks)
Blast furnaceores, raw metal, metal tools and armor only5 s
Smokerfood only5 s
Campfirefood only, 4 at a time, no fuel needed30 s

Common smelts: raw iron/gold/copper → ingot; sand → glass; cobblestone → stone → (again) smooth stone; logs → charcoal; clay ball → brick; raw meat and fish → cooked; potato → baked potato; kelp → dried kelp; cactus → green dye; netherrack → nether brick; ancient debris → netherite scrap; wet sponge → sponge.

Fuel (items smelted per one fuel in a furnace)

FuelItems
Lava bucket100 (the bucket is returned)
Block of coal80
Dried kelp block20
Blaze rod12
Coal or charcoal8
Log, planks, wooden blocks1.5
Wooden slab0.75
Stick, sapling, wool0.5
Bamboo, scaffolding0.25

Blast furnaces and smokers burn fuel twice as fast, so the same fuel smelts the same number of items. Charcoal (smelted from a log) is a full replacement for coal.

What a furnace window shows

A furnace-type block has three slots: input on top, fuel below it, output to the right. The output slot only takes items out. Its progress numbers are, in order: fuel time left (ticks), the total burn time of the current fuel, cook progress (ticks), and total cook time (200 in a furnace, 100 in a blast furnace or smoker). Smelting continues while the block stays loaded, with nobody at it. Taking the output out awards the smelting experience.

Workstations

BlockWhat it does
Crafting table3x3 crafting
Furnace / blast furnace / smokersmelting (above)
Stonecutterone stone block → stairs, slabs, walls, bricks without waste
Smithing tablenetherite upgrades and armor trims
Anvilrenames, repairs, and combines enchanted items and books (costs levels)
Grindstoneremoves enchantments (returns some experience) and repairs by combining two of the same item
Enchanting table / brewing standsee enchanting_and_brewing
Loompatterns on banners
Cartography tablecopies and expands maps

Most workstations are also villager job sites (see villagers_and_trading).

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