Free tool
Rug Size Calculator
Most rooms get a rug one or two sizes too small. Tell the calculator what you are furnishing — a living room, a bed, a dining table — and it returns the standard size that fits, the bare floor it leaves on each side, and a plan of how it sits.
Recommended size
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How big should a rug be?
There is one rule underneath every answer on this page: the rug has to reach the furniture. A rug that stops short of the sofa turns a room into an island floating in bare floor, and the room reads smaller than it measures. Everything else — the 18 inches of border, the 24 inches around a dining table — is that one rule expressed in numbers for a particular piece of furniture.
Two habits fix most rug mistakes. Tape the outline on the floor before you buy: painter's tape at the size you are considering tells you more in ten seconds than an hour of scrolling. And when you are stuck between two sizes, take the larger one. A rug that is slightly too big looks deliberate. A rug that is too small looks like a mat.
What size rug for a living room
Start with the room, not the sofa. Measure wall to wall, subtract roughly 18 inches of bare floor on each side, and buy the largest standard size that still fits inside what is left. A 12 × 15 room lands on a 9 × 12. A 10 × 12 room lands on an 8 × 10. A 14 × 18 room can carry a 12 × 15. In a small room the border shrinks to 8 or 10 inches rather than the rug shrinking a whole size — the floor border is the flexible part, the rug is not.
Then check the furniture. In the usual arrangement the front legs of the sofa and of every chair stand on the rug and the back legs stand on the floor; the rug ties the group together and you never step from wood onto wool mid-stride. If the room is generous enough to put all legs on the rug, do it — that is the most expensive-looking option and the reason showrooms use it. Only put the rug under the coffee table alone when the room genuinely cannot take more; it is a compromise, not a look.
What size rug for a queen bed
A queen mattress is 60 × 80 inches, and the answer almost always is an 8 × 10. Push it under the bed so the rug begins at the headboard: 18 inches of rug show on each side — enough for both feet on a cold morning — and about 40 inches show past the foot, which is where a bench or a basket goes. A 9 × 12 does the same with a wider frame if the bedroom allows it and the nightstands can stand on the rug too.
The budget version is a 6 × 9 pulled down so it covers the lower two-thirds of the bed. It works. It is visibly the smaller decision. The other honest alternative is a pair of 2.5 × 8 runners, one on each side of the bed — cheaper than one big rug, and the choice that makes sense when the floor underneath deserves to be seen.
What size rug for a king bed
A king is 76 inches wide, and that width is what rules out the 8 × 10 almost everyone tries first: it leaves ten inches per side, so your foot lands half on wool and half on floor. The working answer is a 9 × 12 — 16 inches on each side, roughly four feet past the foot of the bed. A California king (72 × 84) takes the same 9 × 12 with a little more at the sides and a little less at the end.
If the room is large enough that the nightstands should also stand on the rug, you are into 10 × 14 territory. That is a real jump in cost, and it is the one case where runners on both sides with bare floor between them is not a compromise but a legitimate second style.
What size rug under a dining table
The number to hold on to is 24 inches — that is how far a chair travels backwards when somebody stands up. The rug has to cover that distance on every side of the table, or the back legs catch on the edge at every meal, and within a year the edge is worn. Thirty to thirty-six inches is more comfortable, particularly if people walk behind the seated chairs.
In practice: a 72 × 40 table for six needs a 9 × 12. A 96 × 42 table for eight needs a 10 × 14. A 60-inch round table is the awkward one: the 24-inch rule asks for a 9-foot round, which almost nobody stocks, so the honest answers are a 9 × 12 rectangle or an 8-foot round with 18 inches of clearance and the occasional chair leg over the edge. Under a dining table the material matters as much as the size — flatweave and low pile let the chairs slide; a thick shag will fight every chair in the room.
Standard rug sizes
| Size | Where it works |
|---|---|
| 3′ × 5′ | Entryways, bedsides, under a small accent chair. |
| 4′ × 6′ | Small bathrooms, reading corners, a bedside pair. |
| 5′ × 8′ | Small living rooms, under a coffee table, a twin bed. |
| 6′ × 9′ | Twin and full beds, small seating groups, breakfast tables for four. |
| 8′ × 10′ | The workhorse: a queen bed, a mid-size living room, a table for six at a pinch. |
| 9′ × 12′ | King beds, standard living rooms, dining tables for six. |
| 10′ × 14′ | Large living rooms, dining tables for eight. |
| 12′ × 15′ | Open-plan rooms and long tables for ten. |
Questions people ask
What size rug do I need for a queen bed?
An 8×10 is the standard answer. Slide it under the bed so the rug starts at the headboard: that leaves 18 inches of rug on each side of a 60-inch-wide queen and about 40 inches past the foot — enough that your feet land on wool on both sides and at the end of the bed. A 9×12 does the same job with a wider border if the room can take it; a 6×9 only works pushed under the lower two-thirds of the bed.
What size rug do I need for a king bed?
A 9×12. A king is 76 inches wide, so an 8×10 leaves only 10 inches per side — you step off the rug before your foot reaches the floor. The 9×12 gives 16 inches on each side and roughly four feet past the foot of the bed. For a California king (72×84) the 9×12 also works, with a little more side margin and a little less at the foot.
What size rug do I need for a living room?
Measure the room, subtract about 18 inches of bare floor on each side, and buy the largest standard size that still fits. In a 12×15 room that lands on a 9×12; in a 10×12 room, on an 8×10. The rug should be big enough that the front legs of every seat sit on it — a rug that only reaches the coffee table makes the room look smaller than it is.
What size rug goes under a dining table?
Table size plus 24 inches on every side is the minimum, 30 to 36 inches is better. That is the distance a chair travels when someone pushes back to stand up — if the back legs drop off the edge, the chair catches on every meal. A 72×40 table for six therefore wants a 9×12; a 60-inch round table wants an 8-foot round or a 9×12 rectangle.
How big should a rug be?
Big enough that the furniture sits on it, not in front of it. The single most common mistake is a rug two sizes too small floating in the middle of the floor. If you are between two sizes and the budget allows, take the larger one — a rug that is slightly too big reads as intentional, a rug that is too small reads as an accident.
What is the standard rug size in the US?
5×8, 8×10 and 9×12 cover most rooms and are the sizes almost every brand stocks. Below those you find 3×5 and 4×6 for entryways and bedsides; above them 10×14 and 12×15 for large open-plan rooms. Runners are usually 2.5 feet wide and 8 or 10 feet long.
Next, the part the calculator cannot decide for you: which rug. Living room guides, bedroom guides and the style worlds cover material, pattern and how a rug reads in a cottage room versus a timeless one.