Calculator

Rug size calculator

Pick the room, enter its size and the border of bare floor you want, then the sofa, the bed or the dining table. The calculator finds the standard rug size that suits the furniture and fits the room, and draws it under the furniture to scale.

Open a starter house Living room layout

Rug size calculator

Feet and inchesMetres

Room

Living roomBedroomDining room

Room length

Room width

Bare floor around the rug 18 in

Ruggable suggests 12 to 18 in in most rooms and 18 to 36 in around a 10 × 14.

Seating

All legs onFront legs onFloating

Sofa length

84 in is a typical 3-seat sofa (Dimensions.com: 72 to 96 in).

Rug for the living room

9 × 12 ft

108 ft² of rug

Border, long walls: 18 in
Border, short walls: 18 in
Rug covers: 60%

The room from above

9 × 12 ft

Long side: need, room and rugs

Furniture needs10 ft
Room takes12 ft
3 × 5 ft5 ft
4 × 6 ft6 ft
5 × 7 ft7 ft
6 × 9 ft9 ft
7 × 10 ft10 ft
8 × 10 ft10 ft
9 × 12 ft12 ft
10 × 14 ft14 ft

Open as a floor plan

How it works

The largest rug the room takes: the room's length and width, each less the border twice.
The smallest rug the furniture asks for. Living room, all legs on: the sofa's length by the sofa, the gap and the coffee table (35 + 16 + 24 in). Front legs on: Mohawk Home's chart for the sofa's length. Floating: no minimum, but the rug must fit between the sofa and the coffee table's far side (24 + 2 × 16 in), so no leg touches it. Bedroom: the bed's width plus the overhang each side, by two-thirds of its length plus the overhang at the foot. Dining: the table plus the pull-back on every side.
The answer: in a living room, the largest standard size between the two (a seating group looks better on more rug); in a bedroom or dining room, the smallest that covers the furniture. A rug may turn either way.
When nothing fits both, the largest rug the room takes, marked as smaller than the furniture asks for.

Sizes and rules, and where they come fromStandard sizes 3 × 5, 4 × 6, 5 × 7, 6 × 9, 8 × 10, 9 × 12 and 10 × 14 ft are from Ruggable's size guide, and 7 × 10 ft from Mohawk Home's rug sizing guide (both checked 11 October 2026). The border default is 18 in: Ruggable suggests a 12 to 18 in border around an 8 × 10 and 18 to 36 in around a 10 × 14. Mohawk's living room chart of furniture length to rug size (furniture up to 7 ft: 8 × 10 or larger) sets the minimum for front legs on. Mohawk places a bedroom rug under the lower two-thirds of the bed, and pairs tables with rugs so chairs stay on when pulled out; its 48 × 72 in table on an 8 × 10 works out to 24 in past every edge, the pull-back default. A 24 in overhang at the bed reproduces Mohawk's bed chart (queen 7 × 10 to 8 × 10, king 8 × 10 to 9 × 12). The 84 in sofa is Dimensions.com's typical length; the 35 in sofa depth and the 16 in gap to a 24 in coffee table are from our living room layout guide. These are style rules, not code.

Worked example

A 15 × 12 ft living room with an 18 in border takes a rug up to 12 × 9 ft. An 84 in sofa with its front legs on wants at least an 8 × 10 by Mohawk's chart. Both 8 × 10 and 9 × 12 fit between those limits, and the calculator picks the 9 × 12: it leaves exactly 18 in all round and covers 60% of the floor. A 10 × 14 would run into the border.

Rug sizes worked with the calculator
Room and furniture	Settings	Rug
11 × 14 ft living room, 84 in sofa	Front legs on, 18 in border	8 × 10 ft
12 × 15 ft living room, 84 in sofa	Front legs on, 18 in border	9 × 12 ft
14 × 18 ft living room, 84 in sofa	All legs on, 18 in border	10 × 14 ft
Any living room, floating	24 in coffee table, 16 in gaps	4 × 6 ft
Queen bed, 14 × 12 ft room	24 in showing, 12 in border	7 × 10 ft
King bed, 14 × 12 ft room	24 in showing, 12 in border	9 × 12 ft
Table for 4 (36 × 48 in)	24 in past each edge	7 × 10 ft
Table for 6 (36 × 72 in)	24 in past each edge	7 × 10 ft
Table for 8 (40 × 96 in)	24 in past each edge	9 × 12 ft
Table for 10 (44 × 120 in)	24 in past each edge	10 × 14 ft

Table sizes are from our dining room dimensions guide. A 10 × 12 ft living room with an 18 in border takes only a 6 × 9, smaller than an 84 in sofa asks for; drop the border to 12 in and an 8 × 10 fits.

Before you buy

Tape it out. Mark the rug's outline on the floor with painter's tape and live with it for a day.
Mind the doors. A thick rug under a door's swing can stop it opening; leave the swing clear or check the clearance under the door.
In a dining room, the room itself needs 36 in from the table to the wall to pull a chair out, as the calculator checks; a rug cannot fix a room that is too small for the table.
Runners and rounds are not included: measure a round table's diameter plus 24 in each side and look for a round rug that size.

Questions

What size rug for a living room?

Most often an 8 × 10 or a 9 × 12 ft. With the sofa against a wall, put at least its front legs on the rug: Mohawk Home pairs a sofa up to 7 ft with an 8 × 10 or larger. Leave 12 to 18 in of floor at the walls.

What size rug goes under a queen bed?

A 7 × 10 or 8 × 10 ft, placed across the bed under its lower two-thirds, so about 24 in shows on each side and past the foot. A king takes an 8 × 10 to a 9 × 12.

How far should a dining rug extend past the table?

About 24 in on every side, so the chairs stay on the rug when pulled out. A six-seat 36 × 72 in table takes a 7 × 10 ft rug.

How much floor should show around a rug?

Ruggable suggests 12 to 18 in in most rooms, and 18 to 36 in around a 10 × 14 in a large room. Mohawk Home advises against a rug that touches the baseboards.

Is a 5 × 7 rug too small for a living room?

Under a coffee table with the seating off it, it can work if it fits between the sofa and the table's far side; with 16 in gaps around a 24 in table that limit is 56 in, so a 4 × 6 fits and a 5 × 7 just reaches under the sofa. With seating on it, a 5 × 7 suits only a loveseat up to 4 ft by Mohawk's chart.