Standard Door Sizes: Interior Dimensions, Nominal vs Actual Sizes
Interior Door Size Chart
Height 79 3/8"
Height 83 1/4"
Height 92 1/2"
Height 95 1/4"
What is a nominal size for a door slab
Nominal sizes are typically used in construction and are rounded up to the nearest inch. For example, a nominal door size of 36 inches would fit into a rough opening 36 inches wide.
The actual size of the door slab may be slightly smaller than the nominal size, typically by about 3/4 inch on each side, allowing for clearance around the door to ensure it can open and close smoothly.
When purchasing a door slab, it's essential to specify the correct nominal size to ensure it fits properly in the intended rough opening.
Nominal and actual door height
Actual door height, inch
Nominal door height, feet
Nominal door height, inch
79 3/8"
6.6"
80"
83 1/4"
6.9"
84"
92 1/2"
7.7"
92 1/5"
Nominal and actual door width
Actual door width, inch
Nominal door width, inch
17 3/4"
18"
23 7/8"
24"
27 3/4"
28"
29 3/4"
30"
31 3/4"
32"
35 7/8"
36"
What are standard interior door sizes?
The standard interior door size in the United States is typically 80 inches in height and 28 to 32 inches in width. However, size variations depend on the intended use, such as for closet or bathroom doors. Here are some standard interior door sizes:
- Closet doors: 24 to 36 inches wide and 80 inches tall.
- Bathroom doors: 28 to 32 inches wide and 80 inches tall.
- Bedroom and office doors: 28 to 36 inches wide and 80 inches tall.
- French doors: 48 to 72 inches wide and 80 inches tall.
It's important to note that these are just general guidelines, and some manufacturers may offer different sizes. Additionally, it's always best to measure the actual opening in your home before purchasing a new door to ensure a proper fit.
Standard interior door sizes by room type
Closet door sizes
Walk-in closet and wardrobe doors are designed to be compact and functional. Standard sizes range from 24 to 36 inches wide and 80 inches high, so you can find options for both small and large storage spaces.
The most common sizes are 24, 28, and 30 inches. Narrower models are usually used for small pantries or hallway closets, while 32- to 36-inch doors work well for larger walk-in closets, providing easy access and a clear view inside.
When picking a size, think about both the width of the opening and how the door will open. Sliding or folding systems can save space in areas where a regular swing configuration might not work. You can find detailed information from experts about other configurations, including step-by-step installation instructions, on our website:
Bathroom door sizes
Bathroom doors need to be compact but still easy to walk through, especially in small spaces. Standard sizes are 28 to 32 inches wide and 80 inches high, which suits most homes.
Slabs that are 28 or 30 inches wide are most common and work well for small bathrooms. Wider slabs, starting at 32 inches, are often chosen for larger or more modern bathrooms that need extra space.
When choosing a door unit size, think about both the opening and how easy it will be to use every day, especially if you have kids or elderly family members. Also, pay close attention to the hardware.
Bedroom and office door sizes
Bedroom and home office doors help provide privacy and comfort, while still letting you move around easily. Standard sizes range from 28 to 36 inches wide and 80 inches high.
In most cases, 30- and 32-inch-wide doors are the most popular choices for bedrooms.
The best slab size depends on your room size and furniture layout. Make sure the door can open fully without blocking the way. If you want more light in a study or bedroom, pick a model with frosted glass inserts for privacy. For better sound insulation, look for doors with an engineered solid core.
What are standard exterior door sizes?
The standard exterior door size in the United States is typically 80 inches in height and 36 inches in width. However, size variations depend on the intended use and the type of building. Here are some standard exterior door sizes:
- Front doors: 36 to 42 inches wide and 80 inches tall.
- Patio doors: 60 to 72 inches wide and 80 inches tall.
- Double doors: 60 to 72 inches wide and 80 inches tall.
- Garage entry doors: 32 to 36 inches wide and 80 inches tall.
Again, it's important to note that these are just general guidelines, and some manufacturers may offer different sizes. Additionally, it's always best to measure the actual opening in your home before purchasing a new door to ensure a proper fit.
FAQ
Is a 42-inch width a standard door size?
No, 42 inches is not a standard width. Most doors are between 24 and 36 inches wide.
Are 96-inch and 108-inch heights standard door sizes?
Not really. 96 inches is considered a standard height, but 108 inches is usually a custom size.
What is the standard door size in cm?
A standard interior door is usually about 200 to 204 cm high and 60 to 90 cm wide. The most common size is 203 by 81 cm.
What is the difference between the actual door size and RO?
The actual size refers to the door slab, while the rough opening (RO) is the larger framed space needed for installation and adjustments.
What is the standard interior door thickness?
Most interior doors are either 1 3/4 inches or 1 9/16 inches thick.