The standard size for an exterior door is 80 inches by 36 inches which is 6 ft, 8 inches by 3 ft. 96 inches or 8 ft. is now very common for newer homes and stock exterior doors are also commonly available in 30 and 32-inch widths.
Standard door height in most homes is 80 inches, or 6 feet 8 inches. This applies to both interior and exterior doors. If you live in a newer home, this measurement will likely be consistent throughout your house. However, older homes, especially those built before the 1950s, may have shorter door heights.
The most common exterior door size is 3 feet wide and 6 feet 8 inches tall. However, there are also slightly smaller doors called 2/3 doors, which are 2 feet 6 inches wide and 6 feet 8 inches tall.
Framing rough opening sizes are really quite simple. Just add 2″ to the width of the actual door size. You should add 2-1/2″ to the height of the actual door. This will give you room to space the door frame off of the sub-floor.
Standard door width in 2023 — Standard (and most common) interior door widths in American homes are 30, 32, 34, and 36". These width dimensions have not changed as much the height.
In summary, standard closet door heights generally vary between 80 and 96 inches, depending on the ceiling height and the type of closet. Be sure to measure carefully and choose a style that complements your home's interior design.
Standard Interior Door Height
Doors that have a height of 80 inches are 6 foot, 8 inches in measurement, which is the reason standard interior doors are known as “6/8 doors.” A 78 inch door would be called a 6/6 door.
The “standard” exterior door size is 36 inches wide by 80 inches tall. This is the standard in most American households with doors ranging in size from only 30 inches wide to 96 inches tall.
There should be a 2mm or 3mm gap between the door and the frame on both sides and the top. If you do need to cut the door down to size, keep in mind that you need to cut all four sides of the door equally whenever possible to retain an accurate shape or pattern if the door is panelled.
The most common garage door sizes we see are: Single garage doors: Most "single car" garage doors measure 8 feet wide by 7 feet high. Double garage doors: Most "double car" garage doors measure 16 feet wide by 7 feet high.
In general, the gap beneath an interior door will be between three-quarters of an inch and half an inch. This width depends largely on the type of flooring, as door frames are generally installed when the floor is unfinished. A standard door can have varying levels of clearance over different flooring types.
The most common standard heights for 2 and 3-panel glass doors are: 6.6 feet (80 inches) 6.8 feet (82 inches) 8 feet (96 inches)
Door widths which are considered standard usually come in sizes of 2/6 (30”), 2/8 (32”) and 3/0 (36”). Standard door heights are 6/6 (78”) and 6/8 (80”). In addition, special sizes can sometimes be custom ordered. A 36” x 80” pre-hung single door will use a rough opening of approximately 38-1/2” x 82-1/4” to fit.
Commercial Door Height: The IBC states that doors should be at least 80 inches tall, with some exceptions.
Building Regulations advise that the height of external doors be 80 inches with a width of at least 36 inches.
Standard door height is a fairly easy metric to understand. The average interior and exterior door is 80 inches or six feet, eight inches tall. While some doors may be taller than this—especially when the door is placed on the exterior of a home—these oversized door sizes may need to be custom-made.
The International Residential code requires that the main exterior door to a property needs to be at least 36 inches wide and 80 inches tall. Because of this international standard, new builds usually feature a standard external door width of 36 inches (3ft) and a height of 80 inches (6.6ft).
Small internal doors will typically be 762mm x 1981mm, while large internal doors can be as big as 926mm x 2040mm. There are even narrow door widths that are only 457mm wide, but these are very rare.
Standard front door sizes
A standard size front door is 3-feet wide by 6-feet-8-inches tall with variations in between. Standard sizes: Width of 3' or 3' 6” Height of 6' 8” or 8'
Standard door height is 80". This measurement may vary, such as for a door in an environment with higher than usual ceilings. Maintain ½" clearance between the floor and the bottom of the door. Usual door width is 30".
In the last couple decades, many more modern homes have been built with taller ceilings. It has become a fairly standard practice to install 7-foot doors in homes with 9-foot ceilings and 8-foot doors in homes with 10-foot ceilings.
Understanding Closet Door Sizes
Standard closet door sizes vary, but most reach around 24 to 36 inches in width and 80 inches in height. This width can accommodate various spaces and allows for easy access to your belongings.
A typical reach-in closet is approximately 6-feet long, 8-feet high, 24-inches deep with an 80-inch high door opening. Reach-in closets are very practical for a single occupant.
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.