You need 24 diamonds for a full set of diamond armor in Minecraft.

Quick Scoop: How many diamonds for full armor?

For a full set of diamond armor , you must craft all four pieces:

  • Helmet – 5 diamonds
  • Chestplate – 8 diamonds
  • Leggings – 7 diamonds
  • Boots – 4 diamonds

Add them up: 5 + 8 + 7 + 4 = 24 diamonds total.

If you’re also planning ahead:

  • Full diamond armor + all core tools (sword, pickaxe, axe, shovel, hoe) = 57 diamonds.
  • Full diamond armor first, then later upgrade to Netherite: still 24 diamonds for the base armor, Netherite uses ingots instead of more diamonds.

In short: 24 diamonds is your magic number if you just want full diamond armor and to walk around fully geared.

TL;DR:
To answer “how many diamonds for full armor”: 24 diamonds for a complete set of diamond armor in Minecraft.

Information gathered from public forums or data available on the internet and portrayed here.