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Wheelchair Turning Space Clearance Checker

Check whether a floor space meets the ADA minimum diameter for a circular wheelchair turning space.

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The available clear width of the floor space.

Measure the clear floor space width. Do NOT deduct for a door swing: ADA 2010 Section 304.4 expressly permits doors to swing into a turning space, and 304.3.1 permits knee and toe clearance complying with 306 to count as part of the circle — so a space that looks too small once the door arc is drawn on it may well comply. What does come off is what is permanently in the way: fixed obstructions, and protruding objects that reduce the clear space.

The available clear depth of the floor space.

Measure the clear floor space depth. As with the width, a door swinging into the space does not reduce it — ADA 2010 Section 304.4 allows that explicitly, and 304.3.1 lets compliant knee and toe clearance under a fixture count toward the circle. Deduct only fixed obstructions and protruding objects.

Limiting available dimension

5 ft

High confidence

MEETS the 60 in (1,524 mm) circular turning space minimum. This checks only the 60-inch (1.524m) circular turning space requirement of ADA Section 304.3.1 — it does not check the alternative T-shaped turning space option (Section 304.3.2), floor slope (max 1:48), surface requirements, or obstructions/protrusions into the space.

Required minimum diameter (ADA 304.3.1)
5 ft
Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

  • Per the ADA 2010 Standards Section 304.3.1, a circular turning space requires a minimum diameter of 60 inches (1,525 mm / 1.524m) — verified against a regulatory-text mirror this session (up.codes), which confirmed the 60-inch/1525mm circular turning space figure directly.

Inputs used

Available Space Width
5 ft
Available Space Depth
5 ft

Intermediate steps

Required minimum diameter (ADA 304.3.1)
5 ft
Final result5 ft

Confidence note: MEETS the 60 in (1,524 mm) circular turning space minimum. This checks only the 60-inch (1.524m) circular turning space requirement of ADA Section 304.3.1 — it does not check the alternative T-shaped turning space option (Section 304.3.2), floor slope (max 1:48), surface requirements, or obstructions/protrusions into the space.

What this calculation does not cover

  • Two dimensions can only describe a rectangle. A bathroom that wraps around a vanity, or a landing that narrows past a radiator, has no single clear width and depth — enter the overall room and this reports a pass while no 60 in circle actually fits anywhere in the clear area. What has to fit is one continuous unobstructed circle in one location, and on an irregular plan that gets drawn, not measured twice.
  • The turning circle is one geometry in the room and it has to coexist with others. Maneuvering clearance on the pull side of the door and clear floor space at each fixture are separately dimensioned areas with their own rules, and a room can hold a compliant circle while the door approach or a fixture approach has nowhere to go. They are permitted to overlap one another, which is what makes this a layout exercise rather than a sum of areas.
  • 60 inches is this document's minimum, not a design target and not the only figure in play. Larger powered chairs and mobility scooters need more room to come about than the minimum circle allows, and a space held to a different standard — a dwelling unit, or a jurisdiction working from ICC A117.1 rather than the 2010 ADA Standards — is measured against that document's own dimensions instead of this one.
5 ft1.52 m5 ft1.52 m25 sq ft2.32 m²2 ft0.5 m

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.0.1

Regulatory standards & verification citations1
  1. Per the ADA 2010 Standards Section 304.3.1, a circular turning space requires a minimum diameter of 60 inches (1,525 mm / 1.524m) — verified against a regulatory-text mirror this session (up.codes), which confirmed the 60-inch/1525mm circular turning space figure directly.
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Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

  • Building an Accessible Rampuses this calculator

    A ramp is one fixed vertical rise divided among runs, landings and handrails - spend that slope allowance before the first form board goes down.

  • Planning a Revolving Door Entranceuses this calculator

    A revolving door is four different diameters and a reserved circle, tested against the lobby before the storefront around it is drawn.

  • Sizing Exits, Doors and Travel Distance for a Flooruses this calculator

    A floor plate becomes an occupant load, the load becomes a number of exits and a width per exit, and the last check is how far anyone has to walk.

How to calculate wheelchair turning space clearance checker in 3 steps

  1. Available Space WidthThe available clear width of the floor space.
  2. Available Space DepthThe available clear depth of the floor space.
  3. Limiting available dimensionThe tool computes the limiting available dimension from those figures and shows the formula, its sources, and a confidence rating alongside it.

Frequently asked questions

What is the minimum diameter for a wheelchair turning space?
Per ADA 2010 Standards Section 304.3.1, a circular turning space requires a minimum diameter of 60 inches (1,525 mm / 1.524m).
Why does this checker use the smaller of width and depth?
A circular turning space needs the full required diameter in every direction, so the limiting (smaller) available dimension determines whether a circle of the required size actually fits.
Does a passing result mean the space is fully ADA-compliant?
No — this checks only the 304.3.1 circular turning space diameter. It does not check the alternative T-shaped turning space option (Section 304.3.2), floor slope (max 1:48), surface requirements, or obstructions/protrusions into the space.
Preliminary estimate, not certified engineering. This tool produces an indicative quantity calculation for planning purposes only — it is not a certified structural analysis, a guaranteed material takeoff, or a substitute for building department approval. Always verify measurements on-site and have a licensed contractor or structural engineer review any load-bearing, code-sensitive, or safety-critical work before purchasing materials or starting construction. Spotted an arithmetic or standards error? Report it to contact@craftquantities.com with your inputs — a confirmed fix gets a permanent check of its own, so the same mistake cannot come back.