Door Width Compliance Calculator
Check ADA door width compliance and calculate required maneuvering clearance for different approach types.
About this calculator
This calculator checks a door's clear opening against the ADA's 32-inch minimum (§404.2.3) and computes the floor clearance needed for a wheelchair to approach and operate it, per Table 404.2.4.1. Door Width (inches) is the only input that moves Clear Opening (inches) at all -- it's simply the nominal door width minus a fixed 2-inch deduction for hardware (0 inches instead if the door is automatic), so every inch added to the door width adds an inch to the clear opening directly. Door Width also drives Maneuvering Clearance (sq ft), since a wider door leaf extends the latch-side clearance zone regardless of which approach direction applies. The Approach setting (Front, Hinge-side, or Latch-side) changes maneuvering clearance by a much larger margin than door width does at typical sizes, because each approach type uses a different fixed depth and latch-side allowance under ADA Table 404.2.4.1's pull-side rows -- 60 inches deep with an 18-inch latch-side allowance for a front approach, 60 inches deep with 36 inches for a hinge-side approach, and 48 inches deep with 24 inches for a latch-side approach.
For example, at a standard 36-inch door, Front approach requires about 22.5 sq ft, Hinge-side about 30 sq ft, and Latch-side about 20 sq ft, a swing of roughly a third between the largest and smallest. Automatic Door removes the 2-inch hardware deduction entirely, since power operators don't need the same swing clearance allowance at the door edge. This checks dimensional minimums only, not door closer force, threshold height, or hardware operability requirements.
Inputs
Results
Clear Opening (inches)
34"
Figures current as of 2010. Source: U.S. Department of Justice, 2010 ADA Standards for Accessible Design, §404.2.3 (Clear Width) and §404.2.4.1 (Table 404.2.4.1, Maneuvering Clearances at Manual Swinging Doors and Gates), 28 C.F.R. Part 36, effective March 15, 2012.
How to Use This Calculator
- Enter Door Width (inches) — the nominal width of the door leaf.
- Set Approach: 1=Front approach, 2=Hinge-side approach, or 3=Latch-side approach based on how a wheelchair user will approach.
- Set Automatic Door to 1 if the door has a power operator, which eliminates the hardware deduction.
- Check Clear Opening (inches) — must be 32 inches minimum; 36 inches is strongly recommended.
- Verify ADA Compliant output (1=Yes) and review Maneuvering Clearance (sq ft) to confirm floor space availability.
How the result changes with Door Width (inches)
| Door Width (inches) | Clear Opening (inches) |
|---|---|
| 18 | 16" |
| 27 | 25" |
| 54 | 52" |
| 90 | 88" |
What each input means
- Door Width (inches)
- Nominal door width in inches. ADA requires 32" minimum clear opening.
- Approach (1=Front, 2=Hinge, 3=Latch)
- Direction of wheelchair approach affects required maneuvering clearance
- Automatic Door (0=No, 1=Yes)
- Automatic doors eliminate the 2" hardware deduction for clear opening
How this is calculated
Worked example, using the default values
- Identify Input ParametersDoor Width (inches) = 36, Approach (1=Front, 2=Hinge, 3=Latch) = 1, Automatic Door (0=No, 1=Yes) = 0 = 3 input(s) provided
- Calculate Clear OpeningClear Opening34 = 34
- Calculate ADA CompliantADA Compliant1 = 1
- Calculate Maneuvering ClearanceManeuvering Clearance22.5 = 22.5
Figures and sources
- Door clear opening width and maneuvering clearances by approach type (2010) — U.S. Department of Justice, 2010 ADA Standards for Accessible Design, §404.2.3 (Clear Width) and §404.2.4.1 (Table 404.2.4.1, Maneuvering Clearances at Manual Swinging Doors and Gates), 28 C.F.R. Part 36, effective March 15, 2012.
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
What determines whether a door passes the ADA clear opening check?
Clear Opening (inches) is the nominal Door Width (inches) minus a fixed 2-inch hardware deduction (or 0 inches for an automatic door), and it must reach at least 32 inches to pass. Since the deduction is constant, door width is the only input that moves this figure -- every inch added to the nominal width adds an inch to the clear opening.
Does the approach direction change how much maneuvering clearance is required?
Yes, substantially -- at a standard 36-inch door, Front approach needs about 22.5 sq ft of maneuvering clearance, Hinge-side approach needs about 30 sq ft, and Latch-side approach needs about 20 sq ft. The 2010 ADA Standards' Table 404.2.4.1 sets a different fixed perpendicular depth and latch-side allowance for each pull-side approach type: 60 inches deep plus 18 inches beyond the latch side for a front approach, 60 inches deep plus 36 inches for a hinge-side approach, and 48 inches deep plus 24 inches for a latch-side approach.
How much does an automatic door opener change the clear opening?
Setting Automatic Door to "Yes" removes the standard 2-inch hardware deduction entirely, since a power-operated door doesn't need the same swing clearance at the door edge that manual hardware requires -- so an automatic door reaches its full nominal width as clear opening, 2 inches more than the same door operated manually.
Why does maneuvering clearance still depend on door width if the approach type dominates it?
Maneuvering Clearance (sq ft) is calculated as approach depth times a width that includes the door width plus a latch-side allowance -- so widening the door leaf still extends the required clear floor space in every approach type, it's just that switching between approach types produces a bigger swing at typical door sizes.
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