How much space does a wheelchair need to turn?
A wheelchair needs a 60 in (152 cm) clear circle to turn through 180 degrees, and a clear route width of at least 36 in (91 cm) to travel along. Where a route changes level, a ramp may be no steeper than 1:12 — one inch of rise for every twelve inches of run. Clear means clear: the circle is measured to the furniture, not to the walls.
Last updated 5 September 2026 · Sources: Neufert, Architects’ Data · Panero & Zelnik, Human Dimension & Interior Space · ADA Standards for Accessible Design
Accessible clearances
| Measurement | Inches | Centimetres | Why |
|---|---|---|---|
| Accessible turning circle | 60 in | 152 cm | Diameter a wheelchair needs to turn through 180°. |
| Clear route width | 36 in | 91 cm | Minimum unobstructed width for a usable route through a space. |
| Circulation aisle | 36–48 in | 91–122 cm | The main path through a room. Below 36 in, two people cannot pass. |
Will it leave enough room?
One wall, one piece. A real room has doors, windows and a second route through it — which is the part Aether checks that arithmetic cannot. Design the whole room →
Slope
A ramp is the one accessible figure expressed as a ratio rather than a distance.
Accessible route slope
No steeper than 1:12
One inch of rise per twelve inches of run — the limit for a self-propelled ramp.
36 inches moves you, 60 inches turns you
The two numbers do different jobs and a space needs both. 36 in is enough to travel down a corridor; it is not enough to turn round in one. A room reachable by a 36 in route but with no 60 in circle inside it can be entered and not left without reversing the whole way out. Kitchens and bathrooms are where this bites, because that is where the turning happens.
These are minimums, and local rules win
The figures here are the accessible design minimums the system works to. They are not a substitute for the building regulations that apply where you are, and where those are stricter, those are the ones that count.
How Aether uses these
Aether checks accessible clearances as part of judging a render, so a layout that leaves no turning circle is flagged rather than delivered as finished work.
Common questions
- What is the wheelchair turning radius for a room?
- A 60 in (152 cm) clear circle, which is the diameter needed to turn through 180 degrees. It is measured to the furniture, not to the walls.
- How wide does an accessible doorway route need to be?
- At least 36 in (91 cm) of clear, unobstructed width.
- What is the maximum slope for a wheelchair ramp?
- 1:12 — one inch of rise for every twelve inches of run.
- Is a 36 inch corridor enough for a wheelchair?
- It is enough to travel along, but not to turn round in. A space also needs a 60 in circle somewhere inside it, or it can be entered and only left in reverse.
Where these come from
- Neufert, Architects’ Data — The reference for built dimensions and spatial standards.
- Panero & Zelnik, Human Dimension & Interior Space — Anthropometric basis for furniture and clearance figures.
- ADA Standards for Accessible Design — Accessible routes, turning space and reach ranges.
Figures are given as the published ranges rather than a single number, because the standards themselves give ranges: the low end is the minimum that works, not the target. Local building regulations take precedence over any of this.