Will a king mattress (76"×80"×12") (193x191x36 cm) fit in a room?

King mattress (76"×80"×12")· 6 ft 4 in × 6 ft 3 in × 14 in

+2 ft 9 in (+31%)of clearance at tightest point

Item being fitted

King mattress (76"×80"×12")6 ft 4 in × 6 ft 3 in × 14 in

Space clearance

Room13 ft × 9 ft × 8 ft

Result

2 ft 9 in of clearance

▸ depth axis · binding

Expert analysis

A king mattress (76"×80"×12") measuring 76 in × 75 in × 14 in fits in a room, with about 2 ft 9 in to spare at the tightest point.

+2 ft 9 in clearance

· ON THE DEPTH AXIS

Your king mattress (76"×80"×12") will fit in the room, with comfortable walkway space around it.

Handling: Position the item in the room using the orientation that maximizes walkway clearance.

6 ft 3 in vs 9 ft

Clearance +2 ft 9 in (+30.6%) on the DEPTH axis

Axis-aligned check (before rotation)
✓	WIDTH	6 ft 4 in	≤	13 ft	+6 ft 8 in	(+51.3%)
✓	DEPTH	6 ft 3 in	≤	9 ft	+2 ft 9 in	(+30.6%)
✓	HEIGHT	14 in	≤	8 ft	+6 ft 10 in	(+85.4%)

Orientation	Min walkway	Strategy	Result
0° (as-is), long wall	2.75 ft	centered	✓
0° (as-is), long wall	2.75 ft	wall_left	✓
0° (as-is), long wall	2.75 ft	wall_right	✓
0° (as-is), long wall	1.37 ft	floating	✓
0° (as-is), short wall	1.33 ft	centered	✓
0° (as-is), short wall	2.67 ft	wall_left	✓
0° (as-is), short wall	2.67 ft	wall_right	✓
0° (as-is), short wall	1.33 ft	floating	✓
90° rotated, long wall	2.67 ft	centered	✓
90° rotated, long wall	2.67 ft	wall_left	✓
90° rotated, long wall	2.67 ft	wall_right	✓
90° rotated, long wall	1.33 ft	floating	✓
90° rotated, short wall	1.37 ft	centered	✓
✓ chosen90° rotated, short wall	2.75 ft	wall_left	✓
90° rotated, short wall	2.75 ft	wall_right	✓
90° rotated, short wall	1.37 ft	floating	✓
1° diagonal	2.64 ft	centered	✓

Margins shown are calculated; allow ±¼ in for tape-measure precision.

How the room-fit check works

A room is a 2D footprint — width and depth matter for placement, plus the walkway gap left between the item and walls or other obstacles.

Place the item footprint inside the room rectangle in the orientation it will be used.
Compute walkway gaps from each item edge to every wall and to other obstacles in the room.
Take the minimum walkway gap — that’s the daily-traffic clearance the room must support.
Verdict ladder (getRoomVerdictTier): walkway <18 in DOESN'T_FIT; 18–24 VERY_TIGHT; 24–36 TIGHT; 36–48 FITS; ≥48 confident FITS.

Walkway thresholds use standard ergonomic minimums; a confident mover may negotiate gaps tighter than the recommended tier.

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