Will a king mattress Fit Through a Door?

✕ Does not fit — 25" too large [why-details] > Why this result? The item cannot navigate the 90° corner — the diagonal sweep exceeds the available turning space by 25". Tightest point: Item vs Opening (width axis) Remaining clearance: -25" (-83.6%) [/why-details] [maneuver-details] > What to try instead The item exceeds the space in every orientation — standard entry won't work. Consider these alternatives: - Disassemble the item - Try an alternate route - Check window access [/maneuver-details] [difficulty-details] > Real-world difficulty Safety margin: Negative Operational expectation: Item exceeds the space — no handling technique can resolve the size difference. [/difficulty-details] [details-below] What we used · High Confidence Corridor: 30" wide Ceiling: 96" Item: item — 12 × 80 × 76" Assumptions - Assumed equal corridor widths on both sides of turn - Assumed standard ceiling height: 8ft (2440mm) All orientations tested (6 orientations) | | Orientation | Corridor | Corner | Ceiling | Limiting | |---|------------|----------|--------|---------|----------| | ✗ | 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 | Step-by-step proof (best: 12×80×76") 1. Corridor width: 12" item ≤ 30" corridor → ✓ (18") 2. Ceiling: 80" item ≤ 96" ceiling → ✓ (16") 3. Corner sweep: 76" length > 51" max → ✗ Binding constraint: item along-corridor length (76") exceeds corner sweep limit by 25" *Measure your specific space to confirm — dimensions vary.*