Door Sizes & Dimensions Reference
Find common U.S. door sizes, standard widths and heights, rough opening dimensions, and useful door measurement information.
Common Door Sizes
| Nominal Size | Width | Height | Common Use |
|---|---|---|---|
| 24 × 80 | 24 in | 80 in | Interior |
| 28 × 80 | 28 in | 80 in | Interior |
| 30 × 80 | 30 in | 80 in | Interior |
| 32 × 80 | 32 in | 80 in | Interior |
| 34 × 80 | 34 in | 80 in | Interior |
| 36 × 80 | 36 in | 80 in | Interior / Exterior |
| 36 × 84 | 36 in | 84 in | Exterior |
| 36 × 96 | 36 in | 96 in | Exterior / Specialty |
Door Size vs. Actual Dimensions
A door's nominal size is not always the same as the physical dimensions of the door unit. The actual slab, frame, and rough opening can each have different measurements.
For example, a door labeled 30 × 80 may have an actual door unit dimension that is slightly larger than the nominal size when purchased as a prehung door. Always check the manufacturer's specifications before ordering or preparing an opening.
Popular Door Size References
Door Size Chart
Browse common U.S. door widths and heights in one reference chart.
Interior Door Sizes
Common interior door widths, heights, and size information.
Exterior Door Sizes
Reference common exterior and entry door dimensions.
Rough Opening Sizes
Understand rough openings and how they relate to door units.
Door Sizes in Millimeters
Convert common door dimensions from inches to millimeters.
Nominal vs. Actual Size
Learn why a labeled door size may differ from its actual dimensions.
Frequently Asked Questions
What is the most common interior door size?
Common interior door sizes include 24, 28, 30, 32, and 36 inches in width, with 80 inches being a common height.
What does a 30 × 80 door size mean?
A 30 × 80 nominal door size generally refers to a door that is approximately 30 inches wide and 80 inches tall. Actual product dimensions may differ depending on the door and frame.
Is the rough opening the same size as the door?
No. The rough opening is the framed opening prepared in the wall for installation. It is normally larger than the door unit to provide space for installation and adjustment.