What Is a Standard Doorway Height?
A standard residential doorway is 80 inches (6 feet 8 inches) tall. This is the most common height for interior and exterior pre-hung doors in the United States and is the baseline that most building codes assume.
In commercial construction, the standard is taller: 84 inches (7 feet). Some commercial entrances and accessible routes go even higher to meet specific clearance requirements.
When we talk about “how high is a doorway,” we are usually referring to the door slab itself, not the frame or the rough opening. The actual finished opening—what you walk through—is slightly smaller because the door frame and floor threshold take up space.
Standard Doorway Dimensions at a Glance
To quickly answer the common questions—how many inches is a doorway, how many ft is a door, and what size is a standard doorway—review the table below. These figures represent typical industry practice for the US market.
| Context | Door Slab Height | Door Slab Width | Finished Opening Height |
|---|---|---|---|
| Residential interior | 80 in (6 ft 8 in) | 30–32 in | ~79.5 in |
| Residential exterior | 80 in (6 ft 8 in) | 36 in | ~79.5 in |
| Commercial standard | 84 in (7 ft) | 36 in | ~83.5 in |
| Commercial accessible (ADA) | 80 in minimum | 32 in minimum | 80 in minimum clear |
| Older homes (pre-1970s) | 78 in (6 ft 6 in) | 28–30 in | ~77.5 in |
The table shows the nominal height of the door slab. The finished opening height—the actual gap you step through—is typically 0.5 inches less because the floor covering and threshold reduce the clear space.
How to Measure a Doorway Opening Correctly
Measuring a doorway is straightforward, but accuracy depends on knowing which dimension you actually need. Buyers and contractors often confuse three different measurements: the door slab, the finished opening, and the rough opening.
Door slab measurement. Measure the door itself from top edge to bottom edge. A standard interior door slab is 80 inches tall. This is the dimension you use when ordering a replacement door that will fit into an existing frame.
Finished opening measurement. Measure from the top of the finished floor (including tile, hardwood, or carpet) to the underside of the door frame header. This is the clear height you walk through. It is usually about 0.5 inches shorter than the door slab because the door sits above the floor with a small gap.
Rough opening measurement. Measure from the subfloor to the top of the rough framing. This is the dimension used during new construction before drywall and flooring are installed. The rough opening is typically 2 to 2.5 inches taller than the door slab to accommodate the frame, shims, and leveling.
To measure accurately, use a tape measure at the center of the opening, not at the sides. Door frames can bow or settle, so take measurements at the left, center, and right; use the smallest reading for height and the narrowest for width.
Doorway Height Variations: Residential vs. Commercial
Residential and commercial projects follow different height conventions because their usage patterns and code requirements differ.
Residential standards. The 80-inch door slab dominates single-family homes. This height works well for the vast majority of occupants and provides adequate clearance without making doors excessively heavy or expensive. Entry doors often use the same 80-inch height, though some custom homes now specify 96-inch (8-foot) doors for a more grand appearance. These taller doors require heavier hinges, reinforced frames, and careful handling during installation.
Commercial standards. Commercial buildings typically use 84-inch doors. The extra height accommodates taller traffic volumes, wheelchair users, and people moving equipment through doorways. Public buildings must also comply with the Americans with Disabilities Act (ADA), which sets minimum clear width requirements but does not specify a maximum height. The International Building Code (IBC) generally requires a minimum clear height of 80 inches for doors in accessible routes, but most commercial specifiers choose 84-inch doors to provide additional clearance.
Older buildings. Homes built before the 1970s often have 78-inch doors. If you are renovating an older property, standard 80-inch replacement doors will not fit without modifying the frame and header. This is a common issue in historic districts where exterior appearance must be preserved.
Why Doorway Height Matters for Your Project
Doorway height affects more than just aesthetics. It influences code compliance, furniture moving, accessibility, and overall construction cost.
Code compliance. The International Residential Code (IRC) requires a minimum finished opening height of 80 inches for doors in dwelling units. If your project falls below this threshold, it will not pass inspection. Commercial projects must meet the IBC and ADA standards, which mandate clear widths of at least 32 inches and typically require the full 80-inch minimum height.
Accessibility. Doorway height is rarely the limiting factor for wheelchair users—width matters more—but it still plays a role. Door hardware must be reachable, and the door must swing open with minimal force. If you are specifying doors for a healthcare facility, school, or public building, review the ADA Standards for Accessible Design carefully. These standards are legally enforceable, and local codes may impose additional requirements.
Furniture and equipment movement. An 80-inch doorway accommodates standard furniture and appliances. However, if your project involves moving large equipment, HVAC units, or oversized furniture, you may need to specify taller doors or plan for alternate access routes. This is a practical consideration that often gets overlooked until move-in day.
Cost implications. Taller doors cost more. The slab itself is more expensive, the frame requires additional material, and installation is more labor-intensive. A 96-inch door can cost 50–100 percent more than an 80-inch door of the same material and finish. For large projects, this difference adds up quickly.
Common Questions About Doorway Measurements
How high is a standard door in feet?
A standard residential door is 6 feet 8 inches tall. In commercial construction, the standard is 7 feet. Both measurements refer to the door slab height, not the frame or rough opening.
What is the standard doorway opening height?
The finished opening height—the clear space you walk through—is typically 79.5 inches for an 80-inch door slab. This accounts for the 0.5-inch gap between the bottom of the door and the finished floor. The rough opening, measured before flooring is installed, is usually 82 to 82.5 inches.
How many inches is a standard doorway width?
Standard widths are 30, 32, and 36 inches. Interior doors commonly use 30 or 32 inches, while exterior entry doors are typically 36 inches. For accessible routes, the ADA requires a minimum clear width of 32 inches when the door is open at 90 degrees.
Does flooring thickness affect doorway height?
Yes. If you install thicker flooring—such as hardwood over a concrete subfloor—the finished floor height rises, reducing the clear opening. A doorway that was compliant before a flooring upgrade may fall below the 80-inch minimum afterward. Always measure from the finished floor, not the subfloor, when checking code compliance.
What if my doorway is shorter than 80 inches?
Doorways shorter than 80 inches are common in older homes and some basement or utility rooms. If the opening is non-load-bearing, you can raise the header to accommodate a standard door. If it is load-bearing, you will need temporary support during the modification. For projects where raising the header is impractical, custom-height doors are available, though they cost more than standard sizes.
How We Meet Standard Doorway Requirements
When you are sourcing doors for a project, the height standard is only the starting point. The real challenge is ensuring that the doors you order match your openings precisely, meet local building codes, and arrive on schedule. As a door and window manufacturer, our approach to this is straightforward: we build to your specified dimensions rather than asking you to adapt to a fixed product line.
We manufacture solid wood doors, thermal-break aluminum doors and windows, and system windows for both residential and commercial projects. Our factory produces doors in standard 80-inch and 84-inch heights, but we also handle custom sizes—including 96-inch entry doors and metric dimensions for international projects. If your project requires a non-standard height, we adjust the profile structure and fittings to match your local building code requirements.
For buyers managing multiple units or large construction projects, consistency matters. We offer OEM and ODM services, which means you can specify the exact dimensions, glass, hardware, and finish for every door. Before shipment, each unit undergoes air-tightness, water-tightness, and wind-resistance testing. We also provide full customs documentation and support both FCL and LCL shipping, so your order moves smoothly from our factory to your site.
If you are planning a project and need help confirming doorway dimensions or sourcing custom-height doors, our team can review your specifications and provide a quote.
