Oak Slab — Minecraft block

Oak Slab

Oak Slab is a half-block step from oak planks — six per recipe, the most common decorative half-floor in vanilla.

Block ID minecraft:oak_slab
Mod Vanilla
Game versions
1.21

Description

Oak Slab is crafted from three oak planks placed in a single horizontal row on the crafting grid, yielding six slabs per recipe — the most generous output ratio in the entire structural variant family. The same conversion runs through a stonecutter for one-to-one efficiency. The slab is half a block tall and can be placed in two configurations: bottom-half resting on a floor, or top-half hanging from a ceiling. Two slabs of the same type stacked vertically merge automatically into a full block, returning the original plank count.

For builders, this is the most-used architectural detail in vanilla. Half-block roof angles, thinner floors that look like fitted boards instead of stacked logs, picnic-bench seats, decorative trim around doorways and windows — almost every project uses slabs somewhere. Walking up a slab counts as a half-block riser, the same as stairs, so smooth movement is preserved without jumping. The block burns in fire and lava and accepts torches, signs, and most surface-mounted items on its flat upper face. Slab variants exist for every wood family and every stone and brick variant in the game.

How to craft this block

Ingredients:
Oak Planks Oak Planks x3
Crafting
Oak Planks
Oak Planks
Oak Planks
→
Oak Slab
6

Used in crafts

  • Daylight Detector
  • Barrel
  • Lectern
  • Chiseled Bookshelf
  • Composter