Everything you need to know about sizing a rug for your bedroom, whatever bed size you have.
Getting the rug size wrong is one of the most common — and most expensive — bedroom mistakes. Too small, and the rug looks like an accident rather than a design choice. Too large, and it competes with the room instead of grounding it. The good news is that bedroom rug sizing follows a few consistent rules once you know what to look for.
Whatever bed size you have, your rug should extend at least 18 to 24 inches beyond each side of the mattress. This means that when you swing your feet out of bed in the morning, they land on rug rather than cold floor — the entire point of a bedroom rug in the first place.
For a queen bed, this typically means an 8x10 or 9x12 foot rug placed so it extends past both sides and the foot of the bed. For a king bed, you'll usually want a 9x12 or larger, since king mattresses are wider and need more coverage to hit that 18-24 inch rule on both sides.
Twin and full beds have more flexibility. A 5x8 or 6x9 rug often works well, especially in smaller rooms where a full 9x12 would overwhelm the space.
There isn't one "correct" way to place a bedroom rug — two layouts are both widely used by designers, depending on your room shape and budget:
Most generic "rug size calculator" tools online use one flat formula regardless of the room. But bedroom sizing actually depends on more than just floor area — the bed's position, the walkway width, and whether you're using a full-coverage or runner-pair layout all change the ideal size. That's why our calculator asks about your specific setup rather than giving you one number for every bedroom.
What size rug goes under a queen bed?
An 8x10 or 9x12 foot rug is the standard choice for a queen bed, positioned so it extends 18-24 inches beyond both sides and the foot of the bed.
Can I use two runners instead of one large rug?
Yes. Placing a runner on each side of the bed, parallel to it, is a common alternative to a single large rug — often more affordable and better suited to smaller bedrooms.
Does the rug need to go under the nightstands?
Not necessarily. Many layouts have the rug extend just past the sides of the bed itself, with nightstands sitting partly or fully off the rug — this is a matter of preference, not a strict rule.