A cuboid has 12 edges.

Quick Scoop: Why 12?

Think of a cuboid (like a brick or a cereal box) as having:

  • 4 edges around the top rectangle
  • 4 edges around the bottom rectangle
  • 4 vertical edges joining top and bottom

Add them up: 4 + 4 + 4 = 12 edges in total.

So, if someone asks “how many edges does a cuboid have?”, the confident one- line answer is:
A cuboid has 12 edges.

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