What size rug goes under a sofa?

For front legs on, one wide enough to run past both ends of the sofa — often 6 in or more each side — and deep enough to reach a few inches under its front legs.

Is an 8 × 10 rug big enough for a living room?

Often, for a front-legs-on layout. A 9 × 8 ft seating group with a 3 ft deep sofa needs about 10 × 5.5 ft, which an 8 × 10 ft rug covers.

Should all furniture legs be on the rug?

Only if you want that look and the room is big enough. It needs a much larger rug: the same group needs about 10 × 9 ft, so a 9 × 12 ft rug.

How far should a rug extend past the sofa?

About 6–12 in past each end is common, so the rug looks anchored rather than floating.

Can a rug be too big for a living room?

Yes, if it reaches the walls or runs under doors. Leaving some floor showing at every wall usually looks better.

Illustration of a sofa and two chairs with their front legs on an 8 by 10 foot rug in a 15 by 12 foot room

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What Size Rug for a Living Room?

Living room rugs are usually sized from the furniture, not the room. The rug should hold the seating group together, and the most common mistake is a rug that only reaches the coffee table, leaving the sofa and chairs stranded around it. This guide covers the three common layouts, how to measure the seating area, and worked examples.

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Three common layouts

Three common layouts comparison
Layout	What it looks like	Rule of thumb
Front legs on	The rug reaches under the front legs of the sofa and chairs	Rug a few inches under the front legs and past the sides
All legs on	Every piece stands fully on the rug	Rug 6–12 in past the furniture all round
Even border	The rug fills the room with floor showing at the walls	A border of about 12–18 in in larger rooms

These are design conventions, not rules. Pick the look you like.

Measuring the seating area

Arrange the sofa and chairs where they will go.
Measure the width of the group from the outside edge of the furthest piece on one side to the other.
Measure the depth from the back of the sofa to the far edge of the group.
Measure the sofa’s depth, back to front, for a front-legs-on layout.

Front legs on: the usual choice

For a seating area 9 ft wide and 8 ft deep, with a 3 ft deep sofa, a rug that runs 6 in past each side and 6 in under the sofa’s front legs needs to be 10 ft wide and 5.5 ft deep. The smallest common size that covers that is 8 × 10 ft, laid with its 10 ft side along the sofa.

If the rug is shallower than the group, the chairs opposite the sofa may end up with only their front legs on too — which is the point of this layout.

All legs on: a bigger rug

Putting every leg on the rug needs much more of it. The same 9 × 8 ft group with 6 in of rug all round needs 10 × 9 ft, and the smallest common size that covers it is 9 × 12 ft. In a 15 × 12 ft room that still leaves floor at the walls.

Leave some floor at the walls

A rug that runs right to the walls looks like wall-to-wall carpet that didn’t quite fit. Leaving even 6 in of floor showing at the edges frames it, and in larger rooms a border of 12–18 in is common. Doors and vents need their own clearance too.

Living Room Rug Size FAQ

What size rug goes under a sofa?: For front legs on, one wide enough to run past both ends of the sofa — often 6 in or more each side — and deep enough to reach a few inches under its front legs.
Is an 8 × 10 rug big enough for a living room?: Often, for a front-legs-on layout. A 9 × 8 ft seating group with a 3 ft deep sofa needs about 10 × 5.5 ft, which an 8 × 10 ft rug covers.
Should all furniture legs be on the rug?: Only if you want that look and the room is big enough. It needs a much larger rug: the same group needs about 10 × 9 ft, so a 9 × 12 ft rug.
How far should a rug extend past the sofa?: About 6–12 in past each end is common, so the rug looks anchored rather than floating.
Can a rug be too big for a living room?: Yes, if it reaches the walls or runs under doors. Leaving some floor showing at every wall usually looks better.