The size difference is simple: a queen mattress is 60 inches wide by 80 inches long, while a king mattress is 76 inches wide by 80 inches long, so the king is 16 inches wider but the same length.

Quick Scoop

  • Queen: 60" x 80"
  • King: 76" x 80"
  • Difference: 16 inches wider, 0 inches longer

What that means

A king gives each person more sleeping space, which is why couples often notice the extra room right away. A queen is usually the better fit for smaller bedrooms because it takes up less floor space.

Simple rule of thumb

  • Choose queen if you want a more space-efficient bed.
  • Choose king if you want maximum width and have room for it.

Bed size| Width| Length| Difference
---|---|---|---
Queen| 60 in| 80 in| —
King| 76 in| 80 in| 16 in wider

TL;DR: A king bed is 16 inches wider than a queen, but both are the same length.