What Are Standard Entry Door Sizes?
The standard entry door size in North America is 36 inches wide by 80 inches tall, with a slab thickness of 1-3/4 inches. This is the nominal size — the figure used to describe and order the door — and it fits a rough opening of approximately 38 inches wide by 82-1/2 inches tall when a standard frame and sill are included.
Not every opening takes a 36 x 80. Residential side and back entries are frequently 32 x 80, and older homes may hold 34-inch or even 30-inch doors. Eight-foot (96-inch) entry doors have become common in higher-end residential construction and in commercial lobbies where a taller proportion is wanted. Whatever the number, the principle is the same: the door is ordered by its nominal slab size, but it must be installed into a rough opening sized to the frame system, not to the slab alone.
Getting this right matters commercially. An entry door is the primary exterior door of a building, and it carries the weather seal, the security hardware, and the first visual impression of the property. A door specified two inches too wide cannot be trimmed down the way an interior slab can — exterior doors are prehung, pre-machined, and finished. The size decision is effectively irreversible once the unit ships.
Entry Door Size Chart: Width, Height, and Thickness in Inches
The table below covers the sizes a buyer is most likely to encounter when specifying a residential or light-commercial entry door. Widths are nominal slab widths; heights are nominal slab heights. Metric equivalents are given because many international buyers work in millimeters and need to confirm a unit will match local framing conventions.
| Nominal Size (in) | Nominal Size (mm) | Typical Use | Notes |
|---|---|---|---|
| 32 x 80 | 813 x 2032 | Secondary entries, utility, basement | Narrowest common exterior size; check furniture and appliance clearance |
| 34 x 80 | 864 x 2032 | Older residential replacements | Often a retrofit size, not a new-construction standard |
| 36 x 80 | 914 x 2032 | Primary residential entry | The North American default |
| 36 x 96 | 914 x 2438 | High-end residential, lobbies | “8-foot” door; requires taller rough opening and header height |
| 42 x 80 | 1067 x 2032 | Wide single entries | Sometimes used where accessibility width is required |
| 60 x 80 | 1524 x 2032 | Double door (two 30-in leaves) | Common double configuration |
| 64 x 80 | 1626 x 2032 | Double door (two 32-in leaves) | Wider double, better for frequent two-leaf use |
| 72 x 80 | 1829 x 2032 | Double door (two 36-in leaves) | Full-width double entry |
Thickness is more consistent than width. A 1-3/4 inch (44 mm) slab is the standard for exterior entry doors in North America and is what most hinges, locksets, and deadbolts are designed around. Thicker slabs — 2-1/4 inches and up — appear in some high-security and commercial specifications, but they require matched hardware and are not interchangeable with standard residential prep.
A note on nominal versus actual: a “36-inch” door is the nominal slab width. The actual slab may measure slightly under 36 inches to allow for clearance and finishing. Do not assume the delivered slab will measure exactly 36.000 inches, and do not order framing to a slab dimension taken from a catalog.
Terms buyers should know
| Term | What it means | Why it matters when buying |
|---|---|---|
| Rough opening (RO) | The framed gap in the wall before the door unit is installed | Determines whether a prehung unit will fit; measured between framing members, not between finished surfaces |
| Nominal size | The size a door is ordered and sold by | Actual slab dimensions can differ slightly; framing must follow the frame system, not the catalog number |
| Slab | The door panel alone, without frame, hinges, or sill | Relevant when replacing a leaf in an existing frame rather than a whole unit |
| Handing | Which side the door hinges on and which way it swings, viewed from outside | A wrong handing cannot be corrected on site; it is fixed at the factory |
How to Measure for an Entry Door (Rough Opening and Slab)
There are two measurements in play, and confusing them is the most common specification error.
The slab size is the door panel itself. The rough opening is the framed gap the entire prehung unit — frame, slab, sill, and weatherstrip — drops into. A prehung 36 x 80 unit typically needs a rough opening of about 38 inches wide and 82-1/2 inches tall, though the exact figure depends on the frame profile and sill height. Always confirm the rough opening requirement against the specific unit’s documentation rather than applying a rule of thumb.
For a replacement, measure the existing opening rather than the old door. Take width at three points — top, middle, and bottom — and height at three points — left, center, and right. On an out-of-square opening, the smallest of the three width readings and the smallest of the three height readings govern, because the unit must fit at its tightest point.
Worked example: an out-of-square opening
Suppose a replacement opening measures 38-1/4 inches at the top, 38 inches in the middle, and 37-3/4 inches at the bottom. The width that governs is 37-3/4 inches — the narrowest point. The unit must be ordered to fit that dimension, and the gap at the wider points is taken up with shims and insulation during installation, then covered by interior and exterior trim.
The same logic applies vertically. If the opening measures 82-3/4 inches on the left and 82-1/4 inches on the right, the governing height is 82-1/4 inches. Ordering to the larger reading would produce a unit that cannot be leveled without cutting the frame or altering the header — both of which compromise the weather seal.
If the opening is out of square by more than roughly half an inch across its width or height, the framing usually needs correction before a prehung unit is ordered. A door forced into a twisted opening will not seal, will not latch cleanly, and will void most finish warranties.
Field checklist before ordering
- Confirm the rough opening width and height at their narrowest points, not their average.
- Check that the header is level and the jambs are plumb; note any deviation beyond about 1/4 inch.
- Verify wall thickness so the frame depth matches the wall assembly.
- Confirm swing direction and handing from the exterior face.
- Note the finished floor height, since it affects the sill and threshold detail.
- Check local code for minimum clear width where accessibility applies.
Entry Door Configurations and Their Size Implications
Configuration changes the overall unit width without changing the slab size of the operating door. This is where a specification often goes wrong: the buyer selects a 36 x 80 door, then adds a sidelight, and the total unit no longer fits the rough opening that was framed.
A single door with one sidelight keeps the 36-inch operating leaf but adds a fixed glass panel beside it, typically 12 to 14 inches wide. The total unit width grows accordingly. A double door uses two leaves — commonly two 30-inch or two 36-inch slabs — and needs a rough opening sized to the combined width plus frame. An arched entry door keeps a rectangular slab and adds a curved transom or arched top section above, which raises the overall unit height and requires a matching arched rough opening in the header.
Lite count is a sizing variable in its own right. A 4-lite entry door carries four small glass panes, a 9-lite entry door carries nine arranged in a grid, and a full glass entry door is glazed across most of the slab. These affect weight, structural reinforcement, and hardware selection more than they affect nominal width, but they matter when the door must meet wind-load or impact requirements.
Accessibility is a separate constraint. Where a jurisdiction applies accessibility provisions such as the ADA Standards for Accessible Design or ICC A117.1, the clear opening width — not the nominal door width — is what is measured, and it is reduced by the thickness of the door leaf in the open position and by the stop. A 36-inch nominal door generally provides a clear opening in the low 30s of inches, which is why 36 inches is the practical minimum for accessible entries and why a 32-inch door often fails that test. Requirements vary by jurisdiction and edition, so confirm the applicable standard locally rather than assuming a single national figure.
Style, Material, and Application Considerations
Material and style choices influence sizing mainly through weight, thickness tolerance, and how the door is finished on site.
Knotty alder entry doors are a common choice for stained, rustic, and craftsman-style entries. Alder takes stain evenly and is dimensionally stable, which matters because a stained door is usually finished after fitting, and any swelling or shrinkage shows at the edges. Craftsman entry doors and shaker entry doors use flat recessed panels and clean stile-and-rail proportions; their sizing is straightforward, but the flat panel geometry makes out-of-square openings more visible than a raised-panel design would.
Farmhouse entry doors and log home entry doors often call for wider units and heavier slabs to suit the architecture. Log home openings in particular tend to be non-standard, since log walls settle and the rough opening is frequently built to a custom dimension rather than a nominal one. In these cases, custom sizing is the norm rather than the exception.
Glass and glazing options are sizing variables as well. Stained glass entry doors are usually built to the slab size with the glazing inset, so the nominal dimensions hold. Entry doors with blinds — sealed between glass panes — add internal thickness but not slab thickness. Entry doors with screens add a removable or fixed screen frame on the exterior, which can affect the reveal and the threshold detail. Black entry doors with sidelights and brown entry door finishes are color decisions, but color affects sizing indirectly: dark finishes absorb heat, and in high-sun exposures the door and frame expand more, so adequate clearance at the jamb becomes more important.
Application drives size as much as style does. Apartment building entry doors are frequently specified wider and taller than single-family entries because of traffic volume and accessibility requirements, and they usually need commercial-grade hardware. Basement entry doors are often 32 inches wide and may be shorter than 80 inches in older construction, since they were built to move utilities rather than people. 8-foot entry doors are chosen for proportion and light, but they require a taller rough opening, a higher header, and longer hinges or a third hinge to carry the extra weight.
How to Evaluate Entry Door Brands and Suppliers
The question of what is the best brand of entry doors does not have a single answer, because the right supplier depends on the specification. A brand that excels at standard 36 x 80 residential units may be the wrong choice for a custom arched unit with stained glass, or for a bulk order of apartment building entry doors that must meet a specific accessibility standard.
Evaluate suppliers on four things instead of reputation alone. First, dimensional capability: can they hold the nominal size you specified, and can they produce non-standard sizes when the opening requires it? Second, documentation: can they supply test data for air-tightness, water-tightness, and wind resistance, and can they produce the packing list, proforma invoice, and customs documents a project shipment needs? Third, profile and hardware flexibility: can the frame profile and fittings be adjusted to match the building codes of the destination market, or is the unit locked to one regional standard? Fourth, inspection before shipment: is there a defined pre-shipment check, or does quality control happen only at the factory gate?
This is the point where a manufacturer’s own process becomes relevant. As a factory-direct supplier, our approach at Jusen Door and Windows is to treat the specification as the starting point rather than the catalog. We build to custom size, color, glass, and hardware, and we adjust the profile structure and fittings so the unit matches the target market’s building codes rather than forcing the opening to match a stock size. Every unit goes through pre-shipment inspection covering air-tightness, water-tightness, and wind resistance. For project buyers, we handle FCL and LCL shipment with full export documentation, and we work from OEM and ODM briefs through to private-label production.
If you are specifying entry doors for a project and want to confirm sizing against your actual rough openings, Get a Free Quote and send your opening dimensions and code requirements.
Related Considerations
A few points that come up repeatedly in entry door specification.
Nominal versus actual dimensions. A 36 x 80 door is sold as 36 x 80, but the delivered slab may be marginally smaller and the frame adds to the overall unit size. Never frame to the nominal number without checking the unit’s rough opening requirement.
Regional variation. Standard sizes are not universal. North American framing conventions, European metric modules, and Middle East project specifications differ, and a door built to one market’s standard may not fit another’s opening without modification. When sourcing internationally, confirm the destination’s framing convention before the order is placed.
Custom sizing. Entry doors can be custom-sized, and for log homes, arched entries, and non-standard renovations they usually have to be. Custom sizing adds lead time and cost, and it removes the option of returning the unit, so the rough opening must be verified twice before production begins.
Replacement versus new construction. In a replacement, the constraint is the existing opening. In new construction, the opening can be framed to the door. The decision flow is different: replacement starts with measurement and works backward to the unit; new construction starts with the unit and works forward to the framing.
Accessibility width. Where accessibility provisions apply, the clear opening — not the nominal width — is the measured dimension. Confirm the applicable standard and edition for the project’s jurisdiction before locking the size.
In short: an entry door is the primary exterior door of a building, defined by its nominal width and height, its 1-3/4 inch slab thickness, its handing, and its configuration as a single door, a door with sidelight, a double, an arched unit, or a full glass design. The most common size is 36 x 80 inches, but side entries, basement doors, and 8-foot entries use other dimensions, and configuration, glazing, and accessibility requirements all change the overall unit size. The rough opening, not the slab, is what must be verified before ordering, and the governing measurement is always the narrowest and shortest point of the opening.
Frequently Asked Questions About Entry Door Sizes
Q: What is the standard size of an entry door?
A: 36 inches wide by 80 inches tall, with a 1-3/4 inch slab thickness. This is the North American default for a primary residential entry. Secondary entries are often 32 x 80, and 8-foot (96-inch) doors are common in higher-end residential and commercial work.
Q: How do I measure for a new entry door?
A: Measure the rough opening — the framed gap — not the old door. Take width at the top, middle, and bottom, and height at the left, center, and right. The smallest reading in each direction governs, because the unit must fit at the tightest point. Also confirm wall thickness, swing direction, and finished floor height.
Q: What is the difference between a 32-inch and 36-inch entry door?
A: The 36-inch door is the standard primary entry and generally provides the clear opening width needed where accessibility provisions apply. The 32-inch door is narrower, common for secondary, utility, and basement entries, and often fails accessibility clear-width tests. The 32-inch size also constrains furniture and appliance movement.
Q: What size rough opening do I need for a 36 x 80 entry door?
A: Approximately 38 inches wide by 82-1/2 inches tall for a typical prehung unit. The exact figure depends on the frame profile and sill height, so confirm against the specific unit’s documentation rather than applying a general rule.
Q: How do sidelights affect the overall entry door size?
A: A sidelight is a fixed glass panel beside the operating door, typically 12 to 14 inches wide. It does not change the slab size of the door, but it increases the total unit width and therefore the rough opening width required. A 36-inch door with one sidelight needs a wider rough opening than a 36-inch door alone.
Q: Can entry doors be custom-sized?
A: Yes. Custom sizing is standard practice for log homes, arched entries, and non-standard renovations. It adds lead time and cost and removes the option of return, so the rough opening should be verified twice before production begins.
Q: What is the best brand of entry doors?
A: There is no single best brand, because the right supplier depends on the specification. Evaluate on dimensional capability, test documentation, profile and hardware flexibility for the destination market, and whether pre-shipment inspection is part of the process rather than an afterthought. For project work, also confirm export documentation and shipping capability.
