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Sofa Dimensions for 2, 3, 4 and 5 Person Couches (Charts & Diagrams)

Nice living room with sofa

How many people does a sofa accommodate? It’s an important question when buying a couch. Of course, it varies whether it’s kids vs. adults, but there are standard dimensions for sofas that accommodate 2, 3, 4 or 5 people.

Below we set out a series of charts and illustrations that show you the proper dimensions of couch depending on how many people you want to accommodate.

Sofa dimensions overview:

The main dimension you need to concern yourself with when choosing a sofa by how many people can sit in it is the width of the seating area.

  • 2-person sofa: 50″ seating width (does not include width of the arms).
  • 3-person sofa: 78″ seating width (not including arms).
  • 4-person sofa: 90″ seating width (not including sofa arms).
  • 5-person sofa: 108″ seating width (not including couch arms).
  • Sofa seat height: 18″ (this can vary but 18″ is a common height for the sofa seat).
  • Sofa seat depth: 24″ to 28″ approximately.
  • Sofa back height: Varies tremendously on sofa style.
  • Total sofa width:  Again, it varies depending on the width of the arms.

Related: List of 101 sofa brands | Top Sofa Styles and Designs | Most Popular Sofa Color | Sectional Sofas Overrated | Chaise Lounge vs. Chaise Sectional Sofa

A. Sofa Dimensions for 2 People

Detailed chart setting out all the many dimensions of a two-seater sofa.

Chart showing sofa dimensions for 2 people

The two-person sofa allots approximately 25″ per person in the sitting area.

B. Sofa Dimensions for 3 People

Detailed diagram setting out all the key dimensions of a sofa for 3 people.

Diagram showing sofa dimensions for 3 people

A three-person sofa allots roughly 78″ in seating width which is 26″ per person.

C. Sofa Dimensions for 4 People

Detailed illustration showing the important sofa dimensions to seat up to four people.

Sofa dimensions for 4 people (chart)

A four-person sofa offers approximately 90″ in width (seating area) which is 22.5″ per person. Again, this can vary.

D. Sofa Dimensions for 5 People

Our final custom diagram that explains the dimensions of a sofa that seats up to five people.

Sofa dimensions for 5 people (custom chart)

The five-person sofa comes in with a total seating width of 120″ plus.  Some are super-sized and can accommodate more than five people.