Door sizes

What is a nominal size for a door slab 

Nominal sizes are commonly used in construction and are usually rounded up to the nearest inch. For instance, a nominal door size of 36 inches would fit into a rough opening that is 36 inches wide. However, the actual size of the door slab may be slightly smaller than the nominal size, typically by about 3/4 inch on each side. This is to allow for clearance around the door so that it can open and close smoothly. Therefore, when purchasing a door slab, it is important to specify the correct nominal size to ensure that it fits properly into the intended rough opening.

Nominal and actual door height

Actual door height, inch Nominal door height, inch  Nominal door height, feet
79-3/8'' 6.6' 80''
83-1/4'' 6.9' 84''
92-1/2'' 7.7' 92-1/5''
95-1/4'' 8' 96''

 

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 height for interior doors is typically 80 inches while the width ranges from 28 to 32 inches. However, the size may vary depending on the purpose of the door, like for closet or bathroom doors. Below are some of the 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 keep in mind that these are just general recommendations and some manufacturers may offer different sizes. Furthermore, it's always best to measure the actual opening in your home before purchasing a new door to ensure a proper fit.

What are standard exterior door sizes? 

The standard size of an exterior door is typically 80 inches in height and 36 inches in width. However, the size of the door may vary depending on the intended use and type of building. Below are some general guidelines for standard exterior door sizes:

- Front doors: These are usually 36 to 42 inches wide and 80 inches tall.
- Patio doors: These are generally 60 to 72 inches wide and 80 inches tall.
- Double doors: These are often 60 to 72 inches wide and 80 inches tall.
- Garage entry doors: These are usually 32 to 36 inches wide and 80 inches tall.

It is important to note that these are just general guidelines, and some manufacturers may offer doors in different sizes. Additionally, before purchasing a new door, it is always best to measure the actual opening in your home to ensure a proper fit