Building materials · Reference
In the US, standard interior doors are 80 in (2032 mm) tall with widths of 24–36 in; the typical entry door is 36×80 in. In the UK, the most common internal door is 1981×762 mm (6'6" × 2'6").
Doors are specified by width × height (front elevation), plus leaf thickness.
| Type | Width | Height | Notes |
|---|---|---|---|
| Closet / pantry / half-bath | 24 in / 610 mm | 80 in / 2032 mm | Smallest common width |
| Secondary bath / utility | 28 in / 711 mm | 80 in / 2032 mm | Thickness 1-3/8 in / 35 mm |
| Bedroom / home office | 30 in / 762 mm | 80 in / 2032 mm | Most common interior width |
| Master bedroom / accessible bath | 32 in / 813 mm | 80 in / 2032 mm | Also widely used |
| Wider rooms / upgraded builds | 34 in / 864 mm | 80 in / 2032 mm | Interior |
| Main / accessible rooms | 36 in / 914 mm | 80 in / 2032 mm | Widest standard interior; ADA-friendly |
| Front / entry (exterior) | 36 in / 914 mm | 80 in / 2032 mm | Most common US exterior; 1-3/4 in / 44 mm thick |
| Metric (H × W × Thickness) | Imperial | Common use |
|---|---|---|
| 1981 × 610 × 35 mm | 6'6" × 2'0" | Kitchens / small rooms |
| 1981 × 686 × 35 mm | 6'6" × 2'3" | Smaller rooms |
| 1981 × 762 × 35 mm | 6'6" × 2'6" | Most common in England & Wales |
| 1981 × 838 × 35 mm | 6'6" × 2'9" | Part M wheelchair access |
| 2040 × 726 × 40 mm | ~6'8" × 2'4" | Common in Scotland / newer builds |
| 2040 × 926 × 40 mm | ~6'8" × 3'0" | Larger opening; FD30 fire door = 44 mm |
Source: Express Doors Direct — Internal Door Size Guide (UK)
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30 in wide × 80 in tall (762 × 2032 mm); 32 × 80 in is also very widely used.
36 in wide × 80 in tall (914 × 2032 mm), typically 1-3/4 in (44 mm) thick.
1981 × 762 × 35 mm — a 6'6" × 2'6" door, the standard across England & Wales.
US interior doors are 1-3/8 in (35 mm), US exterior doors 1-3/4 in (44 mm); UK internal doors are 35 mm, with FD30 fire doors at 44 mm.
No. The US uses inches (80 in / 2032 mm height); the UK uses metric named by imperial — 1981 mm (6′6″) height in England & Wales, 2040 mm in Scotland.
Every figure on this page is traced to a named source, linked under each table. Standard sizes come from published standards and established industry references; where a size is a typical range or varies by manufacturer, we say so. Sizes vary by region, model and revision — treat these as the standard reference, and confirm the exact spec of the item you are selling.
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