In both commercial buildings and residential homes, the standard door height is 80 inches, which is typically required by building codes. Door widths vary more frequently, but you can find an average exterior standard door width of 36 inches, and an average interior standard door width of between 28 and 32 inches.
An interior door is used to separate two rooms or provide privacy. The standard door measurements of an interior door are 80 inches by 36 inches.
Standard Interior Door Width
Some older closet doors are as narrow as 18 inches, but in modern homes they are 30 inches in width. The standard interior door width is 28 to 32 inches.
For reference, standard interior door widths range from 24"-36" (finished opening). While a standard door height is 80" (finished opening). The difference between a rough opening and finished opening is usually 2-3 inches.
Standard Size for Closet and Utility Doors
In houses built before 1990's the doors could be as narrow as 18 inches. Newer comes usually have a width of 30 inches and a standard high of 96” inches.
The most common interior door width found in a bedroom is 30 inches. However, if your bedroom plans include a reading nook with an over-stuffed sofa or a towering antique wardrobe, you need to make sure the door size can accommodate those pieces.
So, if you have a bedroom door that is 30″ wide (which is considered a 2/6 or 2′-6″ door) just add 2″ to the width and frame it 32″ wide. The height is 80″ (which is considered 6/8 or 6′-8″) add 2-1/2″ to the actual door height and frame it 82-1/2″ high.
A gap of around 1/8th of an inch is recommended for standard doors to keep the elements out, protect the paint on the trim, and ensure that the door closes and opens smoothly. The right amount of space is equal to the thickness of your door with a little extra room for clearance while opening or closing.
If the gap between the door and the frame is too small, you can widen it by adjusting the hinges. To bend the hinge, place the butt end of a nail between the hinge leaves, or against the knuckle. Pull the door closed, slowly and carefully, and the nailset will force the gap to widen.
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. The most standard internal door sizes are: 457mm x 1981mm.
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.
For most interior rooms, a door that's 80 inches tall and 30 inches wide tends to hit the mark. It's the classic 'straight-leg' of door sizes—versatile and commonly used.
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. American interior doors are usually available in increments of 2", giving you a range of typical door widths of 28", 30", 32", 34", 36".
Again, you don't want to cut too much away or you'll risk damaging its structural integrity and have to replace the outer frame. It's generally recommended not to take more than a quarter-inch off the sides.
Common widths for internal doors range from 520mm to 920mm, while external door widths often fall between 820mm to 920mm.
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.
To create the right door frame, you'll need to know the measurements of the door you're going to install. With a measuring tape, measure the width and the height of your new door. Then, add two inches to the width and 1 ½ inches to the height. These will be the measurements you use to create your door frame.
Regardless of the door frame and door con- struction, and the level of fire rating of swinging doors, NFPA 80 limits the maximum clearance dimension between the bottom edges the doors and the floor surface to 3/4-in.
It is definitely a matter of personal taste, but as the one holding the big picture vision, you will need to keep a few things in mind. Too many different shades of natural wood in the home might clash. An oak floor might not look great with a door in the shade of maple.
How Wide is a Door in a Typical Home? When it comes to average door width, you can expect a lot more variance in the size of your doors. Typically, the standard exterior door is 36 inches wide, while the standard interior door size is 32 inches wide.
In conclusion, a 30-inch door is precisely 30 inches wide in terms of the door slab. However, when installing it, you will need to consider the framed opening, clearance requirements, swing, and other factors to ensure that the door fits snugly and operates correctly.
A pre-hung door is a door set consisting of everything that you need to install it into your opening. A slab door is simply just the door. A slab door is included in pre-hung doors. The difference being that the slab door in a pre-hung set will come with the frame and hinges already attached.
Add 10mm to the door height to get the reveal height. Add 48mm to the door height to get the overall height. Subtract 30mm from the reveal width to get the clear opening width. Subtract 15mm from the reveal height to get the clear opening height.