What is the standard door size in the US?

US interior doors are typically 32 inches wide by 80 inches tall. Exterior (entry) doors are 36 inches wide by 80 inches tall. These dimensions follow the International Residential Code (IRC R311.2).

Are European doors the same size as American doors?

No. European doors follow DIN or EN standards and are measured in millimeters. A standard European interior door is 860 mm wide (about 34 inches) — 2 inches wider than the US standard. Heights also differ: 2,100 mm (82.7 inches) versus the US 80 inches.

What is the minimum door width for wheelchair access?

The ADA (Americans with Disabilities Act) requires a minimum clear width of 32 inches for accessible doorways. The UK equivalent under Part M of Building Regulations requires 775 mm (30.5 inches) clear width, though 800 mm (31.5 inches) is recommended.

Why do door sizes vary by country?

Each country has its own building code governing minimum dimensions for safety, accessibility, and structural standards. Climate, construction traditions, and metric vs. imperial measurement systems all contribute to the differences.

What is the standard door size in the UK?

UK interior doors are typically 762 mm (30 inches) wide by 1,981 mm (78 inches) tall under BS 4787. Exterior doors are 838 mm (33 inches) wide. These are slightly narrower and shorter than US doors.

How do I measure a door opening for furniture delivery?

Measure the clear width (frame edge to frame edge, not the nominal door size), the clear height (floor to frame header), and the depth of the frame. The clear width is always smaller than the listed door size due to the frame and stops.

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Door Sizes by Country — International Comparison

Compare standard door sizes across the US, UK, EU, Australia, Canada, and Japan. Interior and exterior dimensions, building codes, and ADA requirements.

Last updated: February 23, 2026

Standard Interior Door Width — Country Comparison

Country	Standard Width	Height	Governing Standard
United States	32″ (813 mm)	80″ (2032 mm)	International Residential Code (IRC 2021)
United Kingdom	30″ (762 mm)	78″ (1981 mm)	BS 4787 (British Standards)
European Union (DIN)	33.9″ (860 mm)	82.7″ (2100 mm)	DIN 18101 / EN 14351
Australia	32.3″ (820 mm)	80.7″ (2040 mm)	AS 1428.1 / National Construction Code (NCC)
Canada	32″ (813 mm)	80″ (2032 mm)	National Building Code of Canada (NBC)
Japan	27.6″ (700 mm)	78.7″ (2000 mm)	JIS A 4702 / Building Standards Act

United States Door Sizes

Standard: International Residential Code (IRC 2021) · Accessibility: ADA Standards for Accessible Design

Interior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard InteriorMost common residential interior door	32	813	80	2032
Narrow InteriorClosets, utility rooms	28	711	80	2032
Wide InteriorMaster bedroom, accessible	36	914	80	2032

Exterior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard EntryMost common front door	36	914	80	2032
Wide EntryCustom or luxury homes	42	1067	80	2032
Double EntryTwo 36-inch doors	72	1829	80	2032

Accessibility minimum clear width: 32″ (813 mm)

United Kingdom Door Sizes

Standard: BS 4787 (British Standards) · Accessibility: Building Regulations Part M

Interior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard InteriorMost common (2'6" x 6'6")	30	762	78	1981
Wide InteriorLiving rooms, bedrooms (2'9")	33	838	78	1981
Narrow InteriorSmall bathrooms, cupboards	24	610	78	1981

Exterior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard EntryMost common front door	33	838	78	1981
Wide EntryAccessible entry	36	914	78	1981

Accessibility minimum clear width: 30.5″ (775 mm) — Part M minimum; 800 mm recommended

European Union (DIN) Door Sizes

Standard: DIN 18101 / EN 14351 · Accessibility: EN 17210 (Accessibility)

Interior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard InteriorDIN standard single leaf	33.9	860	82.7	2100
Narrow InteriorBathrooms, utility	29.5	750	82.7	2100
Wide InteriorAccessible rooms	37.4	950	82.7	2100

Exterior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard EntryCommon entry door	39.4	1000	82.7	2100
Double EntryDouble leaf entry	55.1	1400	82.7	2100

Accessibility minimum clear width: 31.5″ (800 mm) — EN 17210 accessible clear width

Australia Door Sizes

Standard: AS 1428.1 / National Construction Code (NCC) · Accessibility: AS 1428.1 (Access and Mobility)

Interior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard InteriorMost common residential	32.3	820	80.7	2040
Wide InteriorLiving areas	35.4	900	80.7	2040
Narrow InteriorLaundry, storage	28.3	720	80.7	2040

Exterior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard EntryStandard front door	35.4	900	80.7	2040
Wide EntryAccessible or custom entry	39.4	1000	82.7	2100

Accessibility minimum clear width: 33.1″ (840 mm) — AS 1428.1 minimum clear opening

Canada Door Sizes

Standard: National Building Code of Canada (NBC) · Accessibility: CSA B651 (Accessible Design)

Interior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard InteriorSame as US IRC standard	32	813	80	2032
Narrow InteriorClosets, utility	28	711	80	2032
Wide InteriorAccessible, master bedroom	36	914	80	2032

Exterior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard EntryNBC minimum entry door	34	864	80	2032
Wide EntryCommon upgrade size	36	914	80	2032

Accessibility minimum clear width: 32″ (813 mm) — CSA B651 accessible doorway minimum

Japan Door Sizes

Standard: JIS A 4702 / Building Standards Act · Accessibility: Barrier-Free Law (Heartful Building Law)

Interior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard InteriorCommon residential sliding/hinged	27.6	700	78.7	2000
Wide InteriorLiving room, accessible	31.5	800	78.7	2000
Fusuma (Sliding)Traditional sliding partition	35.4	900	70.9	1800

Exterior Doors	Width (in)	Width (mm)	Height (in)	Height (mm)
Standard EntryTypical genkan entry	31.5	800	78.7	2000
Wide EntryModern or accessible	35.4	900	78.7	2000

Accessibility minimum clear width: 31.5″ (800 mm) — Barrier-Free Law minimum for accessible buildings

Related Fit Calculators

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Standards Referenced

IRC R311.2Egress door minimum clear width (32 in.) View source
ADA 404Accessible doorways — maneuvering clearance and opening force View source
IBC Chapter 10Means of egress — commercial corridor and door widths View source