What Are Standard Door Sizes?
Standard Interior Door Sizes
Common Interior Door Widths
Common Interior Door Heights and Thickness
Height is far more consistent than width. The vast majority of interior doors are 80 inches tall, and that height has become the default across most new construction and replacement projects. Some homes use taller doors – 84 or 96 inches – particularly where ceiling heights allow for it, but 80 inches remains the size you’ll encounter most often.
Thickness follows a similar pattern. Most interior doors measure 1 3/8 inches thick, which is the standard for lighter, everyday passage doors. A thicker option, 1 3/4 inches, is also available and is generally chosen when a heavier, more substantial door is preferred.
Browse JMD Global’s Interior Doors to see current options across these standard sizes.
Standard Exterior Door Sizes
Exterior doors are built around a narrower set of standard sizes than interior doors, largely because there’s less variation in how they’re used. The most common exterior door size is 36 inches wide by 80 inches tall, and this holds true across most manufacturers and most homes. Secondary or service entrances sometimes use a narrower 32-inch door, but 36 inches is what you’ll find at most front entries.
Exterior doors are also commonly built to a thicker specification than interior doors – 1 3/4 inches is the figure most often associated with standard exterior doors, reflecting the fact that these doors are exposed to more wear and need to hold up over time. As with interior doors, taller options in the 84- to 96-inch range are available for homes with higher ceilings.
See JMD Global’s Exterior Doors for available sizes and configurations.
Door Size Reference Chart
Here’s a quick reference for the dimensions covered above.
Door Type | Common Width(s) | Common Height(s) | Common Thickness |
Interior Door | 18″–36″ (most common: 24″–32″) | 80″ (also available: 84″, 96″) | 1 3/8″ (also available: 1 3/4″) |
Exterior/Entry Door | 36″ (also common: 32″ for secondary doors) | 80″ (also available: 84″, 96″) | Commonly cited as 1 3/4″ |
How to Measure a Door Opening
What If Your Door Opening Isn’t a Standard Size?
Not every opening fits neatly into a standard size, especially in older homes or in spaces with custom architectural details. If your measurements fall outside the common ranges above, you’re not necessarily stuck. JMD Global’s in-house Door Shop prepares doors prehung or built to custom specifications, which gives you a path forward when a standard size doesn’t line up with what you have.
FAQ
What is the standard width of an interior door?
Interior door widths commonly range from 18 to 36 inches, with 24 to 32 inches being the most frequently used range. The right width depends on the room and how it’s used.
What is the most common exterior door size?
A common exterior entry door size is 36 inches wide by 80 inches tall. Other dimensions are also available, so the existing opening should always be measured before selecting a replacement door.
Can I install a smaller door in a standard-sized opening?
It’s possible, but it typically requires additional framing or filler material to close the gap properly. In most cases, matching the door size to the actual opening gives a cleaner result than adjusting a smaller door to fit.
What should I do if my door opening isn’t a standard size?
If your opening doesn’t match a standard width or height, a door prepared to custom specifications is usually the most straightforward solution. JMD Global’s Door Shop can prepare doors prehung or built to your specific measurements.
Ready to Find the Right Door?
Once you know your door size, browse JMD Global’s Interior Doors and Exterior Doors categories to see what’s available. If your opening falls outside standard dimensions, reach out about a door prepared to custom specifications through our Door Shop. JMD Global supplies doors to customers throughout Florida for both residential and commercial projects.
