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Will a king fit in a 12 × 12 room? Enter your bedroom size and bed size — this bed clearance checker counts the frame, works out the real walk-around space on every side, and names the largest bed the room actually wants.
Measure the room wall to wall. Clearances here are pure wall arithmetic — closets, windows and the door swing decide the real answer, which is exactly what placing it on your own plan checks.
Mattress sizes are standardised; bedrooms are not, and beds are not either. A frame adds 2–5″ on each axis, so a "queen bed" on a floor plan is not 60 × 80 — with a typical frame it is closer to 65 × 85, and a wingback headboard or a storage footboard adds more. When you shop a real bed, the listing's outer frame dimensions are the numbers that matter.
| Size | Mattress W × L | Notes |
|---|---|---|
| Twin | 38 × 75 | kids, bunks |
| Twin XL | 38 × 80 | dorm standard; two make a split king |
| Full / Double | 54 × 75 | one adult, honestly |
| Queen | 60 × 80 | the American default |
| King | 76 × 80 | as wide as two twin XLs |
| California King | 72 × 84 | narrower, longer |
These verdicts are the ones our bedroom guide publishes — pure wall arithmetic, with the dresser counted. The calculator shows you the row that matches your room alongside its own answer, because the arithmetic is the floor and the guide is the advice.
| Room | Largest bed that works | What the math says |
|---|---|---|
| 10 × 10 | Full | full leaves ~31″ per side; a queen drops that to ~27″ with no wall left for a dresser beside it |
| 10 × 12 | Queen | the standard secondary bedroom: queen on the 10′ wall, dresser opposite the foot |
| 11 × 13 | Queen, king tight | queen plus dresser and a chair; a king works only with clear side walls |
| 12 × 12 | King — conditionally | ~31″ per side if nothing else lives on those walls; the door swing is the judge |
| 12 × 14 | King | king plus dresser without squeezing the walkways |
| 13 × 15 + | King + extras | primary-suite territory: bench at the foot, chair, double dressers |
A king with frame is about 81″ wide on a 144″ wall — 63″ left, a comfortable 31½″ per side. Then add a 20″-deep dresser and its 36″ of standing room to one side wall and you have committed 56″ of it: the bed slides off-centre, one side drops to the minimum, and whether the door still opens decides everything.
That is a lot of arithmetic for one corner of one room, and it is the reason this tool exists — and the reason the app draws it instead. Full write-up: Bedroom sizes — what fits and bed sizes & clearances.
Everything above is wall math, and wall math is the easy half. A real bedroom has a closet door that swings, a window you would rather not headboard over, a radiator, and an entry door whose quarter-circle lands exactly where the nightstand wanted to be. Those are the things that actually decide a layout, and none of them are in a room's width and length.
So the verdict here is a floor, not a promise: if the arithmetic fails, the room fails. If the arithmetic passes, the plan still gets a vote. That is what Poché is for — the same clearances drawn on the drawing you already have, with the door swings in place.
Conditionally. A king mattress is 76 × 80″ and a typical frame adds 2–5″ per axis, so plan it at about 81 × 85. On a 144″ wall that leaves 63″ to split between the two sides — a comfortable 31″ each, if nothing else lives on those walls. Add a 20″-deep dresser and its 36″ of standing room and you have committed 56″ of one wall: the bed slides off-centre, one side drops to the minimum, and the door swing decides whether it works at all.
24–30″ beside the bed on each side — enough to walk, to make the bed, and to open a nightstand drawer. Make it 36 where a side doubles as the main path through the room. The foot of the bed is a walkway like any other: 36″ where it is the route, and never under 30. A nightstand itself sits 0–12″ from the bed, and flush is correct.
A queen. It is the standard secondary bedroom: put the queen on the 10-foot wall and it leaves about 27″ each side, with 59″ opposite the foot — room for a dresser. A king will physically work if you turn it, headboard on the 12-foot wall, at about 31″ a side and 35 past the foot; but that layout leaves no wall over 56″, which is what a dresser and its open drawer need. The bed is rarely what runs out of room. The dresser is.
Always. Mattress sizes are standardised and beds are not: a frame adds 2–5″ on each axis, so a queen bed on a floor plan is not 60 × 80 but closer to 65 × 85. A wingback headboard or a storage footboard adds more again. When you shop a real bed, the listing's outer frame dimensions are the numbers that matter, not the mattress size on the box.
36″. An open drawer is about 26″ of that and you stand in the rest. Dressers run 48–72″ wide × 18–20″ deep, so a dresser commits its depth plus 36 — around 56″ of the wall it faces. That single figure is why a queen fits a 10 × 12 room and a king does not: it is not the bed, it is the dresser.
Yes, and in a child's room or a small guest room it is often the right answer — it buys the whole clearance back for one open side. The cost is that the bed can only be made from one side, which most adults sharing a bed will not accept for long. The calculator reports the pushed-to-the-wall figure alongside the centred one so you can see what the trade buys.
Upload the plan you already have, drop a king with real frame dimensions into the actual room, and watch the clearance halos do this whole page for you — door swings included.
Try it on your plan →