Mobility & Home Access
Wheelchair Doorway Width Calculator
Use this wheelchair doorway width calculator to find the minimum door width for a wheelchair and the door size you should install. It checks the standard wheelchair door width, the door width for ADA compliance, and the minimum door width for wheelchair access in cm — so you can plan a parent's home with confidence and test whether an existing door already passes.
Door width needed
Doorway results
A typical manual wheelchair needs at least a 32 in clear opening; install a 36 in door to give a comfortable 34 in clear opening.
Reference: ADA
Clear opening versus nominal door width
Japan source: MLIT Barrier-Free Building Design Standard (FY2025 revision) uses an effective entrance width of at least 80 cm on principal accessible routes. Residential requirements and door hardware vary, so measure the actual effective opening and confirm locally before remodeling.
How the doorway width is calculated
The number that matters is the clear opening — the actual gap a wheelchair rolls through with the door open 90 degrees, not the size printed on the door. This calculator works in three steps:
recommended clear opening = max(ADA 32 in, device width + 6 in clearance), then it adds 2 inches when you choose a 90° approach, and finally recommended door size = recommended clear + 2 in, rounded up to the nearest standard door (30, 32, 34, or 36 in). The 2-inch difference accounts for the open door panel, the stop, and the hinge offset that all eat into the gap.
Door width for ADA compliance
| Door leaf (nominal) | Approx. clear opening | Metric clear | Verdict for wheelchair access |
|---|---|---|---|
| 30 in | ~28 in | ~71 cm | Below ADA — too narrow for most wheelchairs. |
| 32 in | ~30 in | ~76 cm | Still below the 32 in clear minimum. |
| 34 in | ~32 in | ~81 cm | Meets the ADA minimum clear opening of 32 in. |
| 36 in | ~34 in | ~86 cm | Recommended. Comfortable for daily wheelchair use. |
The 90° approach and hallway width
When a wheelchair has to turn 90 degrees from a hallway straight into a doorway, there is far less room to line up. ADA guidance calls for extra width in that situation, so this tool adds about 2 inches to the recommended clear opening and assumes the hallway is at least 36 inches (915 mm) wide. If the hallway is narrower than 36 inches, widen the doorway further or rework the approach.
Common mistakes
- Measuring the door leaf instead of the clear opening — remember the gap is about 2 inches less than the door size.
- Forgetting wheel-to-wheel clearance: a 26 in chair needs more than 26 in to pass without scraping knuckles.
- Ignoring the approach. A head-on door that works fine can be too tight when entered from a side hallway.
- Leaving the door stop and hinge hardware out of the math, which shrinks the real opening.
Safety note
These figures follow widely cited ADA accessibility guidance and are a planning starting point. Offset (swing-clear) hinges can recover roughly 2 inches of clear opening without rebuilding the frame, and residential codes vary. Confirm requirements locally and have a contractor verify any structural change before you commit.
FAQ
Wheelchair door width FAQ
What is the minimum door width for a wheelchair?
The ADA minimum clear opening for a doorway is 32 inches (815 mm) measured with the door open 90 degrees. For comfortable daily wheelchair access, aim for a 34 to 36 inch clear opening.
What is the minimum door width for wheelchair access in cm?
The ADA minimum clear opening is about 81.5 cm (32 inches). A comfortable clear opening of 34 to 36 inches is roughly 86 to 91 cm.
What is the standard wheelchair door width?
A standard 36 inch (915 mm) door leaf gives about a 34 inch clear opening once you subtract the door thickness, stop, and hinge offset, which exceeds the ADA 32 inch minimum and is the usual target for wheelchair access.
Why is the clear opening less than the door size?
A hinged door's clear opening is about 2 inches less than the nominal door leaf size because the open door panel, the door stop, and the frame all intrude into the gap. So a 36 inch door gives roughly a 34 inch clear opening, and a 34 inch door gives about 32 inches.
Do I need a wider door for a 90 degree approach?
Yes. When a wheelchair must turn 90 degrees from a hallway into a door, maneuvering room is tight, so add about 2 inches of clear opening and keep the hallway at least 36 inches (915 mm) wide.