Will a **chair *door (100x81x86 cm) fit through a 900 cm door?
Expert analysis
A **chair *door measuring 39 in × 32 in × 34 in fits through a door, with about 3 ft 10.5 in to spare at the tightest point. The binding dimension is height: in its best-fitting orientation, the height is what comes closest to the limit, and it still clears. We checked every orientation and confirmed at least one places the **chair *door fully inside without compression or disassembly. That margin already subtracts a 1.5 in handling allowance, so it reflects a realistic load rather than a paper-thin theoretical fit. One caveat: applied practical clearance for handling (see tolerance buffer above).
- Binding axis
- Height
- Tightest clearance
- 4 ft clear
- Orientations checked
- 6
- Result
- Every axis clears
It fits with clearance on every axis.
- Every axis clears the opening — height is the tightest.
- Checked all 6 orientations — at least one fits cleanly.
- A 1.5 in handling allowance is already subtracted.
- No tilting or compression needed.
| Orientation | Width | Height | Result |
|---|---|---|---|
| ✓ chosen0.86×0.81 m (sideways) | 8.14 m | 1.22 m | ✓ |
| 1×0.81 m (laid flat) | 8 m | 1.22 m | ✓ |
| 1×0.86 m (front/back) | 8 m | 1.17 m | ✓ |
| 0.81×0.86 m (sideways) | 8.19 m | 1.17 m | ✓ |
| 0.86×1 m (front/back) | 8.14 m | 1.03 m | ✓ |
| 0.81×1 m (laid flat) | 8.19 m | 1.03 m | ✓ |
Margins shown are calculated; allow ±¼ in for tape-measure precision.
How the door-passage check works
A door is a 2D opening — width and height matter; depth (path length through the doorway) doesn’t.
- Generate all 6 dimension permutations of the item (3 axes × 2 flips).
- For each permutation, apply the door constraint: item_width ≤ door_width AND item_height ≤ door_height.
- Subtract 1.5 in handling clearance from each axis to leave room for human movement.
- Pick the permutation with the largest minimum-axis margin — that’s the orientation a mover would choose.
- Verdict ladder (verdict-tiers.js): FITS if margin ≥ 2 in; FITS_TIGHT if 0.5–2 in; FITS_VERY_TIGHT if 0–0.5 in; DOESN'T_FIT below.
Tolerance ±¼ in (6 mm) is applied implicitly (band promotion to FITS_VERY_TIGHT) — see the note below the orientation matrix.
Dimensions
- MEASUREDReal-world factors (trim, baseboards, hardware) may reduce available clearance.
- MEASUREDSingle dimension detected for item1m
- MEASUREDEstimated depth, height from local_db (depth, height not provided by user)
- STANDARDDoor height80" (2032mm)
- MEASUREDApplied 38mm practical clearance for handling
Space geometry
- Square corners and a flat floor
- No trim, fixtures, or hardware protruding into the opening
- Door swings fully open (90°+) and stays open during passage
Handling
- ±¼ in tape-measure tolerance applied
- 1.5 in handling clearance subtracted from raw margins before the verdict
- Item treated as rigid — cannot compress, bend, or disassemble.
Why we make assumptions
ItemFits fills in anything you don’t measure yourself. Whenever you see [standard], the real value in your home may differ — measure it and message us in the chat below; we’ll re-run the math.
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