Carpet
Rug size rules for living rooms, dining rooms and bedrooms
A rug is sized by the furniture on it, not by the room. Too small is the common mistake. Here are the rules for each room and the standard sizes they lead to.
Size by the furniture
A rug ties a group of furniture together. If it is too small, it floats in the middle of the room and the furniture looks scattered around it. So the starting point is not the room’s size but the furniture group the rug sits under. The room then sets the upper limit: designers leave 12 to 18 inches of bare floor between the rug and the walls, so the rug does not look like a wall-to-wall carpet that shrank.
These rules are designers’ conventions, not standards. They exist to prevent the too-small rug, and when in doubt the advice is to go one size up.
Standard sizes
Rugs come in a short list of standard sizes in the US: 3 × 5, 4 × 6, 5 × 8, 6 × 9, 8 × 10, 9 × 12, 10 × 14 and 12 × 15 ft. Rounds, runners and custom sizes exist, but a standard size costs much less. The aim is the standard size that follows the furniture rule and still fits the room.
Living room: front legs on
The commonest rule for a living room is that the front legs of the sofa and every chair sit on the rug. The rug must be longer than the sofa, by about 6 inches at each end, and deep enough to reach under the front legs of the seats on each side.
A 16 × 13 ft living room
An 84 inch sofa, the seating group 8 ft deep from the front of the sofa to the front of the facing chairs.
- Length: 84 in + 6 in at each end = 8 ft
- Depth: 8 ft − 1.5 ft so only the front legs sit on it = 6.5 ft
- Largest rug leaving 18 in at the walls: 10 × 13 ft
- Recommended: 8 × 10 ft
Living room: all legs on
In a large room, or to define a seating area in an open plan, every leg of every piece sits on the rug. The rug must then reach beyond the back legs. For the same sofa and seating group, the minimum becomes 9 × 9 ft, and the standard size is 9 × 12 ft, which still fits the 16 × 13 ft room.
Dining room: chairs stay on
A dining rug must be large enough that the chairs stay on it when pulled out. Otherwise a chair leg catches the rug’s edge every time someone stands. Add about 24 inches on every side of the table.
A 14 × 12 ft dining room
A 6 × 3.33 ft table.
- Rug: (6 + 4) × (3.33 + 4) = 10 × 7.3 ft at least
- Largest rug leaving 18 in at the walls: 9 × 11 ft
- Recommended: 8 × 10 ft, turned to match the table
An extending table should be measured extended if it is often used that way.
Bedroom: under the lower two-thirds
A bedroom rug usually goes under the lower two-thirds of the bed, running crosswise, with enough showing at the sides to step onto when getting up. For a queen bed, 5 ft wide, the rug should reach about 21 inches past each side.
A queen bed in a 14 × 12 ft bedroom
- Width across the bed: 5 ft + about 21 in each side = 8.5 ft
- Depth: two-thirds of an 80 in bed plus 18 in beyond the foot = 5.9 ft
- Recommended: 6 × 9 ft, crosswise under the bed
A king bed in a 16 × 14 ft room takes an 8 × 10 ft rug the same way.
The rug size calculator applies each of these rules to your furniture and room and lists the standard sizes that work.
Measure before you buy
Mark the rug’s outline on the floor with painter’s tape or with sheets of newspaper before buying. Live with it for a day: walk around it, pull out chairs, open doors. A door that catches the rug’s edge needs a thinner rug or a different position. The floor area calculator gives the room’s size, and the guide to measuring odd rooms helps with L-shaped and open-plan rooms, where the rug defines one zone rather than the whole room.
Rug pads
A rug on a hard floor needs a pad, both to stop it sliding and to protect the floor. The pad is cut about an inch smaller than the rug on every side so it does not show. On vinyl plank and some finishes, rubber pads can stain or react; choose a felt or natural rubber pad labelled for your floor. Rug pads are a different product from wall-to-wall carpet pad, which the carpet padding calculator counts.
Wall to wall instead
If the rule leads to a rug almost as big as the room, wall-to-wall carpet may be the better buy. The carpet roll guide explains how carpet is cut and priced, and the carpet padding guide covers what goes under it. A large rug and a wall-to-wall carpet of the same area can cost much the same.