Definition
What it means.
- ADA door minimum width
- United States accessibility rules set a floor on usable doorway width so that wheelchairs and mobility aids can pass: 32 inches of clear opening, measured between the face of the open door and the stop. It is a clear-opening figure, not a nominal door size, so an accessible door is usually hung in a wider frame. ItemFits uses it as a familiar real-world yardstick when describing how generous or tight a given opening is.
- ADA minimum clear opening
- 32 in Source: ADA Standards §404.2.3
In depth
The fuller picture.
A clear-opening rule, not a door size
United States accessibility rules put a floor under usable doorway width so wheelchairs and mobility aids can pass. The ADA requires at least 32 inches of clear opening, measured between the face of the door open 90 degrees and the stop on the far jamb. The key word is clear: it is the gap that is left, not the nominal door size, so an accessible door is usually hung in a wider frame to leave 32 inches once the leaf and stop are subtracted.
The 32 inch figure is also a useful yardstick. When a measured opening lands near it, ItemFits can note that the doorway is about as wide as an accessible entrance, which gives the raw number a familiar frame of reference. Where the opening is more than 24 inches deep, such as a thick wall, the ADA raises the requirement to 36 inches.
Measure it
How to measure.
In practice
How it shows up.
When a measured doorway lands near 32 in of clear opening, ItemFits can note it meets the ADA accessible minimum to give the number a familiar frame of reference.
Go deeper
Related terms and tools.
Frequently asked
Questions we keep getting.
Does a 32-inch nominal door meet the ADA minimum?
Not necessarily, the 32-inch rule is clear opening, so a 32-inch nominal door can fall short once its open leaf and stop are subtracted.
01How is the ADA clear width measured?
Between the face of the door open 90 degrees and the stop on the opposite jamb, which is the unobstructed gap an item actually passes through.
02Is the minimum ever more than 32 inches?
Yes, when the opening is deeper than 24 inches, such as a thick wall or vestibule, the ADA raises the clear width requirement to 36 inches.
03