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Standard door size
A standard US interior door is 80 × 32 inches (203 × 81 cm). In the UK, it's 78 × 30 inches (198 × 76 cm) — slightly shorter and narrower.
80 × 32 inUS standard
203 × 81 cmUS in cm
78 × 30 inUK standard
Door sizes by country and type
| Type | US | UK |
|---|---|---|
| Standard interior height | 80 in (203 cm) | 78 in (198 cm) |
| Common interior width | 28–36 in (71–91 cm), 32 in most common | 27–33 in (686–838 mm), 30 in most common |
| Standard exterior height | 80 in (203 cm) | 80 in (203 cm) |
| Standard exterior width | 36 in (91 cm) | 813 mm (32 in) |
Width varies more than height — closets, bathrooms and utility rooms often use narrower doors (24–28 in) than bedrooms and main entries. Always measure the existing rough opening before ordering a replacement door; "standard" is a starting point, not a guarantee.
Frequently asked questions
What is a standard door size in the US?
80 × 32 inches (203 × 81 cm) for most interior doors.
What is a standard door size in the UK?
78 × 30 inches (198 × 76 cm), sometimes expressed as 1981 × 762 mm.
Are all interior doors the same width?
No — widths commonly range from 24 to 36 inches depending on the room; 30–32 inches is most typical for main rooms.