What size bed fits a 12 × 12 bedroom

A 12 × 12 ft bedroom has 144 square feet, a common size for a primary bedroom in smaller homes. A King fits with walkways on both sides, with no inch to spare across the bed, and a Queen fits comfortably.

Walkways on both sides

With 24 inches on each side and at the foot, plus one 20 inch nightstand: Twin fits with 38 inches to spare; Twin XL fits with 38 inches to spare; Full fits with 22 inches to spare; Queen fits with 16 inches to spare; King fits exactly, with no inch to spare; California King fits with 4 inches to spare. Across the bed the King uses all 144 inches; along the bed there are 40 inches left beyond the foot walkway, so the space is long but not wide.

One side against a wall

With one long side against a wall, a 24 inch walkway on the other side and at the foot, and no nightstand: Twin fits with 45 inches to spare; Twin XL fits with 40 inches to spare; Full fits with 45 inches to spare; Queen fits with 40 inches to spare; King fits with 40 inches to spare; California King fits with 36 inches to spare. Against a wall every size fits with at least 36 inches spare.

What these results assume

The results use nominal mattress sizes, not frames. A frame, headboard or footboard adds length and width, so enter the frame's outside dimensions in the room calculator if you have them. The room is treated as a clear rectangle: doors, closets, windows and radiators are not modelled, so measure those separately. The 24 inch walkways follow the calculator's default and can be changed there.

For this room

A King works only if the whole headboard wall is usable, with no door swing or radiator in the way; a second nightstand or a wider one does not fit beside it. A California King is narrower than a King and leaves 4 inches across, at the cost of being 4 inches longer. A Queen leaves 16 inches, enough for a second small nightstand.