Free tool

Sofa size calculator

Enter the wall the sofa goes against and the narrowest door on the way in. You get the length that fits, the kind of sofa that is, and the space to leave around it.

About 80 in long

Two-thirds of the 120-inch wall. That's a long apartment sofa or a short three-seater.

  • Range60 to 80 inches: half to two-thirds of the wall
  • Coffee table14 to 18 inches in front of the sofa
  • Walkways30 to 36 inches for the main path; 18 to 24 at the least
  • Through the doorIts smallest side, usually the depth, can be at most 28 inches. Standard sofas are 34 to 38 deep, so check the height too and measure every turn.

See it in your own room

The numbers say it fits. A picture says whether the deep green velvet or the oatmeal linen suits the room, next to what you already own. Photograph the room, add the sofa from any store, and see it in place.

Try it free How the sofa visualizer works

The rules behind the numbers

  • Length: about two-thirds of the wall behind it [1][2]. Half to two-thirds is the range [3].
  • Kinds by length: a loveseat runs 52 to 63 inches, an apartment sofa 60 to 78, a standard three-seater 84 to 90, and a sectional 95 and up [3].
  • Coffee table: 14 to 18 inches from the front of the sofa [1][3]; another guide says 12 to 18 [2].
  • Walkways: 30 to 36 inches for main paths [1], at least 36 in high-traffic areas [2], and 18 to 24 inches at the least [2][3].
  • Depth: standard sofas are 34 to 38 inches deep, front of the seat to the back of the frame [3].
  • Getting it in: allow 2 inches on each side of the sofa's smallest dimension [3], and measure doorways, hallways and the corners it has to turn [1].

Picked the sofa? The coffee table size calculator, the rug size calculator and the wall art size calculator start from its width.

Sources

  1. 7 sofa scaling secrets design experts want you to know, Homes & Gardens. Read November 9, 2026.
  2. Sofa Size Guide: How to Choose the Right Sofa for Your Room, Furniture City. Read November 9, 2026.
  3. How to Choose the Right Sofa Size for Your Room, Tradesource Furniture. Read November 9, 2026.

Questions

What size sofa for a 10 foot wall?

About 80 inches: two-thirds of the 120-inch wall. Anything from 60 to 80 inches keeps to the half-to-two-thirds range, so an apartment sofa or a short three-seater fits.

What size sofa for a 12 foot wall?

About 96 inches, two-thirds of 144. A standard 84 to 90 inch three-seater also sits well within the range.

What is the 2/3 rule for sofas?

A sofa about two-thirds the length of the wall behind it tends to look in proportion, with room left for side tables or a walkway. Some guides go as low as half the wall.

How much space should be between a sofa and a coffee table?

14 to 18 inches: close enough to reach a drink, far enough for your legs.

How much walkway do you need around a sofa?

30 to 36 inches for the main path through the room. Paths people use less can be 18 to 24 inches.

Will a sofa fit through my door?

Take the sofa's smallest dimension, usually its depth, and add 2 inches on each side: a 32-inch door takes a sofa up to 28 inches on that side. Measure hallways, stairs and turns too.

Will it look right in my room?

The numbers say it fits. To see the exact sofa from any store in your own living room, take a photo and add it: Renderior shows it in place, with a link to buy it.

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See the sofa in your room before you buy it.

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