A 2-foot door measures 24 inches (2 ft / 610 mm) wide, and the most common matching height is 80 inches (6 ft 8 in / 2032 mm).
A 24-inch door is the narrowest width on a standard US interior door schedule, which is why it turns up in closets, pantries, and utility nooks instead of main hallways. Knowing the nominal label, the actual slab measurement, and the rough opening before you order saves a return trip — those three numbers are never the same. This guide gives you each in feet, inches, and millimeters, plus the labeling shorthand builders use.
What Size Is a 2-Foot Door in Inches and Millimeters?
A 2-foot door is 24 inches wide (610 mm) and typically 80 inches (2032 mm) tall. Door sizes are written width-first in the US, so “24 × 80” reads as width by height.
The shorthand on order forms and blueprints is feet-and-inches: 24 in × 80 in becomes 2-0 × 6-8 (“two-foot, six-eight”). Standard interior thickness is 1-3/8 in (35 mm); exterior doors are commonly 1-3/4 in (44 mm).
- Width: 24 in = 2.0 ft = 610 mm
- Common height: 80 in = 6 ft 8 in = 2032 mm
- Interior thickness: 1-3/8 in = 35 mm
- Shorthand label: 2-0 × 6-8
Nominal vs. Actual Size: Why the Numbers Don’t Match
A “24-inch” door is nominal; the actual slab is smaller — usually 23.375 to 23.5 inches wide and 79.375 to 79.5 inches tall on a 24 × 80 prehung interior door. The gap exists because the frame, jambs, and clearance eat a fraction of an inch on every side.
This is the most common source of ordering mistakes. A slab measuring 23.5 inches isn’t an oddball — it’s a standard 24-inch nominal door. Always order by the nominal label, not the tape measure.
For a 24 in × 80 in prehung interior door, the rough opening is commonly about 25.5 inches wide and 82.5 inches high — the framed gap the unit slides into, sized larger for shimming and squaring.
| Measurement Type | Width | Height |
|---|---|---|
| Nominal (as ordered) | 24 in / 2 ft / 610 mm | 80 in / 6 ft 8 in / 2032 mm |
| Actual slab | ~23.375–23.5 in | ~79.375–79.5 in |
| Rough opening (prehung) | ~25.5 in | ~82.5 in |
| Slab thickness (interior) | 1-3/8 in / 35 mm | — |
| Slab thickness (exterior) | 1-3/4 in / 44 mm | — |
| Blueprint shorthand | 2-0 | 6-8 |
| Typical use | Closet, pantry, utility | Standard height |
Where a 2-Foot Door Belongs — and Where It Doesn’t
A 24-inch door is reserved for closets, pantries, and tight utility spaces, because it’s narrower than the 32-inch minimum passage width cited in many consumer guides. It’s rarely a primary passage door. Common US interior widths run 24, 28, 30, 32, and 36 inches; step up to 32 or 36 inches for bedrooms, bathrooms, and hallways. The 24-inch size earns its place where traffic is light and floor space is scarce.
Height is more forgiving: interior doors are commonly 80 inches, with 84-inch and 96-inch versions in some homes, usually newer builds with taller ceilings. A 24-inch door at 96 inches tall would look unusual, so 80 inches is the practical match.
If you’re replacing one and want to compare real, tested options before ordering, the top-rated 2-foot door picks we tested walk through slab and prehung choices by room type.
How To Measure Before You Order
Measure the rough opening — the framed gap in the wall — not the old door. Manufacturers size prehung units to standard rough openings, so a 24 × 80 door expects roughly 25.5 in × 82.5 in of framed space.
- Pull the existing trim and measure the framed opening at its narrowest point, top to bottom and side to side.
- Compare your numbers against the 25.5 in × 82.5 in rough opening for a standard 24 × 80 prehung unit.
- Order by the nominal label (24 × 80), not the slab measurement off the old door.
- Check thickness: 1-3/8 in for interior, 1-3/4 in for exterior or heavier-duty doors.
Direct Doors maintains a door size conversion table mapping nominal widths to inch and millimeter equivalents, and Bob Vila’s overview of standard door sizes covers the same ground for US homes. Either confirms the 24 in / 610 mm figure you’ll be ordering against.
FAQs
Is a 2-foot door too narrow for a bedroom?
Yes, in most cases. A 24-inch door falls below the 32-inch passage width recommended in many consumer guides, making it awkward for foot traffic and moving furniture. Bedrooms, bathrooms, and hallways typically use 32- or 36-inch doors. Save the 24-inch size for closets, pantries, and storage spaces.
What is the rough opening for a 24-inch prehung door?
For a standard 24 in × 80 in prehung interior door, the rough opening is commonly about 25.5 inches wide and 82.5 inches high. That extra space allows for shimming, squaring, and the frame itself. Always measure your framed opening at its narrowest point before ordering.
Why is my 24-inch door actually measuring 23.5 inches?
Because 24 inches is a nominal size, not the actual slab measurement. A standard 24-inch door typically measures around 23.375 to 23.5 inches wide and 79.375 to 79.5 inches tall. The difference accounts for the frame, jambs, and clearance. Order by the nominal label, not your tape measure.
References & Sources
- J.B. Kind. “Standard Door Sizes.” Supports common interior widths, heights, and 2-0 × 6-8 labeling.
- Direct Doors. “Choosing Your Door – Door Size Conversion Table.” Confirms inch-to-millimeter conversions and nominal sizing.
- Bob Vila. “Standard Door Sizes.” Covers standard US door dimensions and typical applications.
