Always measure from the brick opening, not the current door or frame. Use the widest width and tallest height measurements to determine the dimensions of your new door. If measurements are not standard, it’s better to buy larger than smaller.

How do you measure a front door opening?

Quote from the video:
Quote from Youtube video: Number measure from the top inside edge of the frame. Down to the top of the sill.

How do I measure my front door for replacement?





Measure to the outsides of the exterior casing, then from the bottom of the sill to the top of the trim. Compare these measurements with those of a prehung door that has standard two-inch-wide “brick molding” trim.

How much bigger than the door should the opening be?

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.

How big is the opening for a 36 inch door?

Standard Sizes



A 36” x 80” pre-hung single door will use a rough opening of approximately 38-1/2” x 82-1/4” to fit. Always remember to square up your door before you nail the frame in place to assure it will close properly.

What size front door do I need?

36” x 80”





The standard size for a front door is 36” x 80”, or about 3′ x 6’7”. Beyond this, you can find exterior door sizes ranging from as narrow as 30” to as tall as 96”. If you have a double door entryway, the standard size will be 72” x 80”, or double the width of a single front door with the same height.

Does door size include frame?

Standard Door Frame Size



The average measurement of 36 by 80 inches refers to the door panel itself, not including the frame. The frame extends beyond the panel, and is installed into the rough opening. The rough opening should be at least ¾ inch wider and ? inch taller than the door frame.

Is a 36 door actually 36 wide?

Entry doors are usually 36 inches wide.



The standard height remains the same, however, at 80 inches. Most entry doors are slightly thicker than interior doors as well, with a standard thickness is 1¾ inches.

What is the actual width of a 36 door?

Standard Door Width & Length Guide

Type Height Width
Standard Door 80” 36”
Sliding Glass Door Sizes 80” 60” – 72”
French Door Sizes 80” 36”
Closet Doors 96” 30”

How big should the opening be for a 32 inch door?



A Rough Cut for a 32-Inch Door A two-foot-eight-inch (32″) by six-foot-eight-inch-high (80″) prehung door, for example, would necessitate a rough opening width of 34 inches and a height of 82 inches.

How much smaller should a door be than the opening?

Ideally, there should be a gap of about 1/8 inch at the top and along each side, and about 3/8 inch at the bottom. Use cardboard spacers or folded matchbooks (four thicknesses equals about 1/16 inch) along with shims underneath to maintain the spacing.

What size door do I need for a 30 inch opening?

Rough opening for a 30 inch door:- for a 30″ door, you will need rough opening to 2 inches wider & 2-1/2″ taller than the actual door size, so, if you are installing a 30″ wide and 80″ tall or 30″×80″ interior, or exterior, barn, bifold & pocket bedroom door, the rough opening will be 32″ wide and 82-1/2″ tall or 32″×

How big is the rough opening for a 30 inch door?



32-1/2 inches. The rough framing should be 2-1/2 inches wider than the door itself. That leaves room for the 3/4 inch finish frame on each side of the door, and then 1/2 inch on each side for the shims between the finish frame and the rough frame.

What is the actual width of a 30 inch door?

In the building trades, a 30-inch door is called a “2-6” door, meaning 2 feet, 6 inches wide, or 30 inches.

What is the rough opening for a 36 inch exterior door?

A pre-hung single door that measures at 36″ x 80″ will require a rough opening of about 38.5″ x 82.25″ for a precise fit. Make sure to align and square up your door before nailing the frame in place so it will close properly.

What is the rough opening of a front door?

Rough Opening of the Front Door



The Rough Opening is the space between the two wall studs the door unit will be attached to. The Rough Opening is typically about 1-1/2” wider than the unit size and about a 1” taller. The space that is left over will be used by the installer to shim and square the unit into place.