Standard Door Sizes: Typical, Common & Average Interior Door Dimensions Explained

80"

84"

96"

Recommended opening dimensions may vary depending on the size and type of door. For more details, please refer to the product page in the 'Choose Size' section.

(2 * 18 x 80) (3'-0" x 6'-8")

48" x 80"

(2 * 24 x 80) (4'-0" x 6'-8")

56" x 80"

(2 * 28 x 80) (4'-8" x 6'-8")

60" x 80"

(2 * 30 x 80) (5'-0" x 6'-8")

64" x 80"

(2 * 32 x 80) (5'-4" x 6'-8")

72" x 80"

(2 * 36 x 80) (6'-0" x 6'-8")

72" x 80"

(4 * 18 x 80) (6'-0" x 6'-8")

84" x 80"

(2 * 42 x 80) (7'-0" x 6'-8")

96" x 80"

(4 * 24 x 80) (8'-0" x 6'-8")

(2 * 18 x 84) (3'-0" x 7'-0")

48" x 84"

(2 * 24 x 84) (4'-0" x 7'-0")

56" x 84"

(2 * 28 x 84) (4'-8" x 7'-0")

60" x 84"

(2 * 30 x 84) (5'-0" x 7'-0")

64" x 84"

(2 * 32 x 84) (5'-4" x 7'-0")

72" x 84"

(2 * 36 x 84) (6'-0" x 7'-0")

72" x 84"

(4 * 18 x 84) (6'-0" x 7'-0")

84" x 84"

(2 * 42 x 84) (7'-0" x 7'-0")

(2 * 18 x 96) (3'-0" x 8'-0")

48" x 96"

(2 * 24 x 96) (4'-0" x 8'-0")

56" x 96"

(2 * 28 x 96) (4'-8" x 8'-0")

60" x 96"

(2 * 30 x 96) (5'-0" x 8'-0")

64" x 96"

(2 * 32 x 96) (5'-4" x 8'-0")

72" x 96"

(2 * 36 x 96) (6'-0" x 8'-0")

72" x 96"

(4 * 18 x 96) (6'-0" x 8'-0")

84" x 96"

(2 * 42 x 96) (7'-0" x 8'-0")

96" x 96"

(4 * 24 x 96)

When choosing doors for your home or construction project, understanding standard size door width and other common dimensions is essential. This guide explains typical and average door sizes, clarifies nominal versus actual sizes, and provides practical tables to help you select the perfect fit for your interior doors.

What Is a Standard Size Door?

The standard size of the door refers to typical dimensions widely used in residential and commercial construction. These sizes are often categorized as nominal sizes, which are rounded numbers for ease of specification, and actual sizes, which are slightly smaller to allow for proper installation and clearance.

For example, a nominal width of 32 inches usually corresponds to an actual door slab width of approximately 31 1/2 inches, providing clearance around the frame.

Understanding std door sizes helps ensure compatibility with door frames and hardware, reducing installation issues.

Typical and Common Door Sizes

The following table summarizes the common door sizes and dimensions used in most U.S. homes for interior doors.

Nominal Width (inches)	Actual Width (inches)	Nominal Height (inches)	Actual Height (inches)	Typical Use
24	23 1/4	80	79 3/8	Closet Doors
28	27 3/4	80	79 3/8	Bathroom Doors
30	29 3/4	80	79 3/8	Bedroom Doors
32	31 3/4	80	79 3/8	Office Doors
36	35 7/8	80	79 3/8	Entry Doors

These typical door sizes may vary slightly depending on manufacturer and region but generally follow these standards to ensure ease of replacement and installation.

Average Door Sizes for Interior Doors

The average door sizes for interior doors in many homes fall within the widths of 28 to 32 inches and a height of 80 inches. Below is a quick overview:

Average width: 30 inches (2 feet 6 inches)
Average height: 80 inches (6 feet 8 inches)

Knowing the average size of interior doors allows homeowners and contractors to plan their spaces efficiently and order doors that fit the most common frames.

Standard Interior Door Sizes Explained

When talking about standard interior door size, we generally refer to the common heights and widths used inside homes. Most interior doors are 80 inches tall, but widths can range:

24", 28", 30", 32", 36" — common widths
80" — typical height for most doors

Here is a table of standard size door dimensions specifically for interior doors:

Nominal Width (inches)	Actual Width (inches)	Nominal Height (inches)	Actual Height (inches)
24	23 1/4	80	79 3/8
28	27 3/4	80	79 3/8
30	29 3/4	80	79 3/8
32	31 3/4	80	79 3/8
36	35 7/8	80	79 3/8

These standard interior door sizes are commonly referred to as std interior door sizes or standard inside door sizes.

How to Measure a Door and Door Frame Correctly

Measuring the size of a door correctly is crucial to ensure proper fit and function.

Width: Measure the width of the door slab itself from edge to edge.
Height: Measure from the bottom to the top of the door slab.
Thickness: Most interior doors are 1 3/8 inches thick, but confirm before ordering hardware.
Rough Opening: Measure the opening where the door will be installed — typically 2 inches wider and taller than the door slab to allow for clearance and shimming.

Accurate measurements help avoid the common pitfalls of ordering the wrong size and facing installation challenges.

Frequently Asked Questions (FAQ)

What is the standard size door width for interior doors?

The standard door width for interior doors typically ranges between 24 inches and 36 inches, with 28", 30", and 32" being the most common sizes.

What does "std door sizes" mean?

"Std door sizes" refers to standard or typical door dimensions commonly used in construction and manufacturing to simplify ordering and installation.

How do nominal and actual door sizes differ?

Nominal door sizes are rounded measurements used for ordering, while actual sizes are slightly smaller to allow for clearance and proper fitting.

How to measure a door correctly?

Measure the door slab width and height, then measure the rough opening size to ensure the door will fit with clearance for installation.

Summary and Recommendations

Knowing the standard size of an interior door is essential for smooth purchasing and installation. The most common sizes range from 24 to 36 inches in width and 80 inches in height. Always measure your door openings carefully and consult with manufacturers about nominal and actual sizes to ensure a proper fit.

Choosing the right door size improves home aesthetics, ensures functional openings, and simplifies installation.

For help selecting the perfect door size or for custom door orders, contact our specialists today!

Standard Door Sizes — Typical and Average Dimensions for Interior Doors