Sofa Size Calculator
Check the longest sofa your room can take, whether the one you like fits with a walkway, and whether it will make it through the door.
Will it fit?
The recommended max leaves a ~90 cm walkway. Carried on its end, a sofa clears a doorway when the opening is at least 5 cm wider than the sofa’s depth, room for blankets and hands (5 cm short here). This checks one opening’s width only: a hallway turn or a stair landing is usually tighter, so measure every turn on the route before you buy.
Getting the size right before you buy
The two ways a sofa purchase goes wrong are buying one that swamps the room and buying one that won’t come through the front door. Both are avoidable with a tape measure. Along the wall, the sofa should leave room to walk past and breathe — not fill the span end to end — which is why this tool reserves a walkway when it works out the recommended maximum length.
The delivery problem is separate. A sofa is tipped on its end and carried through, so it is the depth of the sofa, not its length, that has to clear the doorway. Check the narrowest opening on the whole route, and remember you can often buy a few centimetres back by taking the door off its hinges or unscrewing the feet.
Frequently Asked Questions
How long should a sofa be for my room?
As a planning rule, leave a walkway of about 90 cm at one end of the sofa and enough room to move in front of it. This tool sets the recommended maximum length to the wall length minus a 90 cm walkway, then checks that your chosen sofa is no longer than that and that there is still a walkway in front of it. Many designers also suggest a sofa span roughly two-thirds of the wall it sits against for good proportion.
Will my sofa fit through the doorway?
A sofa is usually carried through a door on its end, so the limiting dimension is the sofa's depth (front to back) against the door's clear opening width. The tool passes a doorway only when its clear opening is at least 5 cm wider than the sofa's depth, a rule of thumb that leaves room for moving blankets and hands; a flush fit is not a fit. If it is short, you may gain room by removing the door from its hinges or taking off the feet, and a sofa carried on its back goes through on its height instead of its depth. This tool reports the doorway clearance so you can see how much room you have — or how much you're short.
What clearance should I leave in front of a sofa?
Aim for roughly 90 cm of clear floor in front of the sofa for a comfortable walkway, or at least 45 cm if a coffee table sits in that space. The tool subtracts the sofa depth from the room depth to show the walkway left in front; if that's below your target it flags the fit.
Should I measure the doorway, hallway, and turns too?
Yes. A sofa can clear the final doorway yet still be stopped by a tight hallway, a stair turn, or a low ceiling on the way in. Measure the narrowest point on the whole route and the diagonal of any corner the sofa must pivot around. This tool checks a single doorway width against the sofa depth as a first-pass sanity check, not the full delivery path: a hallway turn is where a long sofa most often gets stuck, and a Yes here says nothing about it.
Does the room area matter for choosing a sofa?
Room area gives a sense of scale — a large sectional can overwhelm a small room even if it technically fits along one wall. The tool shows the room area so you can weigh proportion alongside the length and walkway checks.
Estimates for planning — not professional interior-design advice. Measure your own space and doorways, including hallways and turns, before you buy.