ποΈ Rug Size Calculator
Find the right rug size for your room using the layout rules designers actually use.
Recommended Rug Size
How to Use This Calculator
Picking a rug size comes down to three measurements and one layout rule per room. This calculator runs the designer math for you and snaps the answer to a standard rug size you can actually buy.
Select your room type: living room, bedroom, dining room, or entryway. Each room uses a different sizing rule.
Enter the room length and width in feet, then the key furniture measurement: sofa length, bed size, or table dimensions.
Read the recommended standard size, the target dimensions behind it, and the placement guidance for that room.
Check the fit note. If the recommended rug is tight for your room, the smaller standard size is usually the safer buy.
The Designer Rules Behind the Math
These rules come from how furniture actually sits on a rug. In a living room the rug needs to be at least as wide as the sofa plus a foot on each side, so the front legs of every seat land on it. In a bedroom the rug extends about 18 to 24 inches past the bed on both sides so your feet land on something soft. In a dining room the 24 inch rule exists because dining chairs get pulled out: if the rug ends under the table, chair legs catch on the rug edge every single meal. In a hallway you want a slim runner that leaves about 6 inches of bare floor on each side, which is why the runner is the hallway width minus 12 inches.
Worked Example
A 12x15 ft living room with an 84 inch sofa. The rule says the rug should be at least 84 + 12 = 96 inches wide. The standard sizes are 5x8 (60 in wide), 6x9 (72 in), 8x10 (96 in), 9x12 (108 in), and 10x14 (120 in). The smallest standard size that covers 96 inches is the 8x10, so that is the recommendation. Place it with the front legs of the sofa and chairs on the rug, leaving 12 to 18 inches of floor between the rug edge and the walls.
Placement Tips That Make the Size Work
The right size only looks right in the right position. In the living room, center the rug on the main sofa and pull it out so front legs sit on it; never push it against the wall under just the coffee table. In the bedroom, start the rug a few inches past the nightstands and slide it two thirds under the bed so the foot of the bed and both sides get coverage. In the dining room, center the table exactly and check chair clearance by pulling a chair out and sitting down: all four legs should stay on the rug. For entryways, center the runner in the hallway and leave about 6 inches clear at the door swing so the door never catches the rug edge.
Frequently Asked Questions
Should the front legs of the sofa be on the rug?
Yes, that is the golden rule designers use. At minimum, the front legs of the sofa and any armchairs should rest on the rug, which anchors the seating group and stops the rug from looking like a postage stamp floating in the middle of the floor. If your budget allows, getting all four legs of every seat onto the rug looks even better and is the layout you see in styled living room photos.
What size rug for a queen bed?
An 8x10 rug is the standard answer for a queen bed (60x80 in). Slide it about two thirds of the way under the bed, starting just past the nightstands, so roughly 18 to 24 inches of rug shows on each side and at the foot. That gives you a soft landing when you get up on either side. A 9x12 works too if the room is large and you want a more generous border.
How much bare floor should show around a rug?
Leave 12 to 18 inches of bare floor between the edge of the rug and the walls in most rooms. That border frames the rug like a picture frame and makes the room look intentional rather than wall-to-wall. In a small room you can go down to about 12 inches, but less than that starts to look like fitted carpet, which defeats the purpose of an area rug.
What size rug goes under a dining table?
The rug should extend at least 24 inches beyond the table edge on every side, so chairs stay on the rug even when someone pulls one out to sit down. For a standard 6-person table (around 72x42 in), that math usually lands on an 8x10 rug. Measure your table, add 48 inches to both the width and the length, and pick the smallest standard rug that covers both numbers.
Can a rug be too big?
Yes. A rug that runs wall to wall with less than about 12 inches of floor showing around it reads as fitted carpet and shrinks the room visually. Oversized rugs also bunch up against baseboards and door swings. When in doubt between two sizes, the smaller standard size is usually the safer pick, as long as it still fits the furniture rule for the room: front legs on in the living room, 24 inches past the table in the dining room.