Room Size Calculator
Not sure of your exact room dimensions yet? Work out the square footage before checking whether your furniture will fit.
Calculate Room SizeFurniture Fit Calculator
Before you buy that sofa or bed, check whether it'll actually fit — with enough room left over to walk around it. Enter the furniture size, your room dimensions, and how much walking clearance you want.
Does It Fit?
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Clearance (length side)
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Clearance (width side)
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Furniture length—
Furniture width—
Room length—
Room width—
Desired clearance—
Actual clearance (length side)—
Actual clearance (width side)—
How this calculator works
This calculator checks whether your furniture fits in the room and still leaves enough space to walk around it — furniture that technically fits can still make a room feel cramped if it's wall-to-wall.
Fit check — the furniture needs room for itself, plus your desired clearance, along both dimensions:
fits = (furniture_length + clearance ≤ room_length)
and (furniture_width + clearance ≤ room_width)
If it doesn't pass that check, we look closer to tell you why:
Too large — the furniture's footprint alone is bigger than the room, before clearance even comes into it. You'd need a smaller piece or a different room.
Tight fit — the furniture itself fits in the room, but there isn't enough space left over for your desired walking clearance. We show you the actual clearance you'd have instead.
Both furniture and room dimensions are compared straight across (furniture length against room length, furniture width against room width) — if your furniture will sit at an angle or against a different wall, swap the length and width figures to match.
Example calculation — using this calculator's default values: a 6 ft × 3 ft sofa, a 12 ft × 10 ft room, and a desired clearance of 3 ft:
Too Large check: 6 > 12? No. 3 > 10? No. → Not too large
Length side: 6 + 3 = 9 ≤ 12 → passes
Width side: 3 + 3 = 6 ≤ 10 → passes
Actual clearance (length side) = 12 − 6 = 6 ft
Actual clearance (width side) = 10 − 3 = 7 ft
Both dimensions pass, so the calculator reports Fits — this sofa fits in the room with 6 ft of clearance along the length side and 7 ft along the width side, comfortably more than the 3 ft requested.
Factors That Affect Your Furniture Fit
Desired walking clearance
How much space you ask the calculator to leave has a big effect on the result. A generous 3 ft clearance is comfortable for a main walkway, but the same furniture might pass easily with only 1.5–2 ft requested for a tighter secondary gap.
Furniture footprint vs. room dimensions
The overall length and width of the piece — not its weight, style, or shape — are what drive this calculation. Two very differently styled pieces with the same footprint will get the same fit result here.
Door and window swing paths
This calculator doesn't know where your doors or windows are, but a door that swings inward can eat into the same floor space you're counting as clearance. Sketch out where doors open before finalizing furniture placement.
Getting furniture through doorways and hallways
Fitting inside the room is only half the problem — the piece also has to travel through every doorway, hallway, and stairwell between the entrance and its final spot. A sofa that fits the room perfectly can still get stuck at a narrow hallway turn.
How the room will be used
A room you'll only walk through occasionally can tolerate less clearance than one used constantly, like a main hallway-adjacent living room or a space that needs to accommodate a wheelchair or walker.
Tips for a More Accurate Estimate
Measure doorways and hallways separately
Before you buy, measure the narrowest point of every doorway, hallway, and staircase the furniture must pass through to reach the room — this calculator only checks floor space inside the room, not the delivery path.
Leave extra clearance near walkways and doors
Spots that get frequent foot traffic — main walkways, doorway swing zones, areas in front of closets — are more comfortable with clearance on the higher end of the 2–3 ft range rather than the bare minimum.
Account for drawers and doors opening
If the piece has drawers, cabinet doors, or a reclining mechanism, measure how far it extends when fully open, not just its closed footprint, and use that larger figure as the furniture length or width you enter.
Measure the room at floor level and note obstructions
Radiators, baseboard heaters, vents, and electrical outlets can all reduce usable floor space even though they don't show up in a simple length-by-width room measurement — factor them in when deciding where furniture can actually sit.
Limitations of This Estimate
This calculator only checks whether the furniture's footprint fits within the room's floor space, plus your requested clearance — it does not check whether the piece can physically get through the doorways, hallways, or stairwells leading into the room. A large sofa or mattress can pass this check and still be impossible to deliver into the space.
It also assumes a simple rectangular room and doesn't account for irregular shapes, alcoves, or existing furniture already in the room that would reduce the usable space further. Clearance needs vary by how the room is used — a space that needs to accommodate a wheelchair or walker typically needs significantly more than the 2–3 ft general walkway guideline used here. Treat this as a starting-point planning check, not a substitute for measuring directly in the room.
Frequently Asked Questions
2–3 ft (about 0.6–0.9 m) is a commonly recommended minimum for a main walkway past furniture. For a tighter secondary gap — like beside a bed or between a dresser and a wall — 1.5–2 ft (about 0.45–0.6 m) can work.
"Too large" means the furniture's footprint alone doesn't fit in the room, before clearance is even considered — you'd need a smaller piece. "Tight fit" means the furniture does fit in the room, but there isn't enough leftover space for the walking clearance you asked for.
No — this is a straightforward footprint check comparing furniture size against room size, plus a flat clearance allowance on each dimension. It doesn't account for door swing, closet access, or a specific walking path — for those, it's worth sketching a rough floor plan or measuring directly in the room.
Yes — use the furniture's maximum length and width, including any armrests, handles, or other protruding parts. If a piece reclines, opens, or extends (like a sofa bed or extendable table), consider checking it in both its closed and open positions.
No — this calculator only checks whether the furniture fits within the room's floor space once it's already inside. It doesn't check doorway widths, hallway turns, or stairwells along the delivery path. Measure your narrowest doorway and hallway separately before you buy, especially for large pieces like sofas or mattresses.
This calculator assumes a simple rectangular room. For an L-shaped room, one with alcoves, or an angled wall, use the dimensions of the largest rectangular section where the furniture will actually sit, or measure the specific area you're placing the piece in directly.
Include them — measure the furniture at its outermost points, including armrests, cushions that flare out, and any decorative elements that add to the overall footprint. Using a smaller "frame only" measurement can make a piece look like it fits when it actually won't.
Not automatically — the calculator only compares the closed footprint you enter against the room. If a dresser's drawers or a cabinet's doors extend well past the frame when open, add that extra distance to the furniture length or width you enter to get an accurate fit check.
Measure length and width at floor level, wall to wall, using a tape measure or laser measure for the most accurate reading. Note the position of any radiators, vents, outlets, or built-in features that reduce usable floor space, since those won't show up in a simple length-by-width measurement.
General walkway guidance of 2–3 ft is meant for casual foot traffic, not wheelchair or walker access. Accessible routes typically need significantly more clearance — often 3 ft or more just for a straight path, with additional space to turn. Check local accessibility guidelines for the specific space you're planning.
This calculator checks one piece against the room at a time. To plan a room with several pieces (like a sofa, coffee table, and TV stand), run the calculator once per item and think through their combined layout separately, since it doesn't add up multiple footprints for you.
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