Will a king mattress (203x193x31 cm) fit through a 76 cm door?
Expert analysis
A king mattress measuring 80 in × 76 in × 12 in does not fit through a door, but it's about 2 ft 1 in too large at the tightest point.
It exceeds the opening at the tightest point.
Your king mattress will not clear the space — and it is clearly over the limit at the tightest point. The passage is the limiting constraint.
Handling: What to try instead The item exceeds the space in every orientation — standard entry won't work.
| Axis-aligned check (before rotation) | ||||||
| WIDTH | 6 ft 8 in | > | 30 in | −4 ft 2 in | (−166.7%) | |
| DEPTH | not applicable (2D opening — door) | |||||
| HEIGHT | 12 in | ≤ | 8 ft | +7 ft | (+87.5%) | |
| Orientation | Corridor | Corner | Ceiling | Limiting | Result |
|---|---|---|---|---|---|
| 80" across, 12" up, 76" along | -50" | — | 84" | width | ✕ |
| 80" across, 76" up, 12" along | -50" | — | 20" | width | ✕ |
| 12" across, 80" up, 76" along | 18" | -25" | 16" | corner | ✕ |
| 12" across, 76" up, 80" along | 18" | -29" | 20" | corner | ✕ |
| 76" across, 80" up, 12" along | -46" | — | 16" | width | ✕ |
| 76" across, 12" up, 80" along | -46" | — | 84" | width | ✕ |
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
- MEASUREDAssumed equal corridor widths on both sides of turn
- STANDARDCeiling height8ft (2440mm)
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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