The Americans with Disabilities Act defines the standard wheelchair width as 26 inches, according to the ADA website, although actual wheelchair models may vary from 24 to 27 inches. The ADA requires that doors for wheelchair access be at least 32 inches wide, as stated by the Houston Chronicle.
The ADA provides a standard wheelchair width in order to allow builders to comply with ADA accessibility requirements, the Houston Chronicle explains. Most standard adult wheelchairs are approximately 26 inches wide, although narrower and wider models are available. Sellers such as Walgreens or SpinLife may list a standard wheelchair for sale at widths varying from 23 to 27 inches, as shown on each business' website.