Will my sofa fit through the door? Measure the ceiling too

Everybody who has ever ordered a sofa online has stood in the hallway with a tape measure, holding it against the door frame like a detective. 90 cm wide door, sofa 85 cm deep. Phew. Order placed. And then, on delivery day, two very strong people and one very large sofa get stuck somewhere completely different.

So, will my sofa fit through the door? Very often: yes, the door is fine. The part that kills sofa deliveries is the 90° corner in the hallway, and what decides that corner is not its width but the ceiling height. I built Will It Fit? to check the whole delivery path, and when I ran a few everyday sofas through it, the result surprised even me.

The door is the easy part

Let's take a big but normal 3-seater: 240 cm long, 85 cm deep, 75 cm high. The flat has a 90 cm door, a 100 cm wide hallway with a right-angle turn, a 100 cm wide staircase and a 400 × 350 cm living room. I left the safety clearance at the default 2 cm, which the tool subtracts from every opening for fingers, blankets and wobble.

Three green lights and one red one, and the red one isn't close. The door is easy because the sofa goes through it lengthways: the 240 cm side goes first and only the 75 × 85 cm cross-section has to pass the opening. Length doesn't matter in a straight line. It only starts to matter when the path turns.

The corner nobody measures

In a 100 cm hallway, the longest 75 cm wide object that can turn the corner while lying flat is 127.2 cm. That's an armchair, not a sofa. Movers know this, so they do the only thing that works: they stand the sofa on its end, turn it like a wardrobe and tip it back down on the other side.

And that's where the ceiling comes in. Standing a 240 cm sofa on end needs 240 cm plus clearance. In a hallway with a 240 cm ceiling (very normal in newer flats), that simply doesn't work. The tool then tries the next best thing, tilting the sofa up by 49.5°, which shrinks its footprint to 220.5 cm. Still far more than the 127.2 cm that can turn. Hence the brutal 93.3 cm too big.

Here's the same sofa family in the same 100 cm hallway, with only the length and the ceiling changing:

Look at that cliff. Ten centimetres more sofa takes you from "fits comfortably" to "not a chance", because the sofa either can stand up in the corner or it can't. And 10 cm more ceiling fixes the 240 cm sofa completely.

My first reflex was "fine, then I need a wider hallway". Nope. With a 110 cm hallway and the same 240 cm ceiling, the 240 cm sofa still fails, by 65 cm. Width helps a bit (the flat-turn limit grows to 155.5 cm), but it can't beat a missing 2 cm of height.

The flip side: if your sofa is short enough to stand up, the corner is boring. The tool's own example, a 210 × 90 × 85 cm sofa in a 100 cm hallway, turns the corner with 17.2 cm to spare. Its problem is the 80 cm door, where it's 7 cm too big. Different sofa, different bottleneck, and that's exactly why I check every point on the way and not just one.

How I fill in the fields before buying

1. Item length, width/depth, height: take them from the product page, but check whether "height" includes the legs and whether the back cushions come off. If the legs unscrew, enter the height without them.
2. Door clear width: measure between the door stops with the door fully open, not the frame. The door leaf and hinges eat a few centimetres.
3. Hallway width before and after the corner: measure both. Many hallways are narrower after the turn, and the narrower side is the one that hurts.
4. Hallway ceiling height: this is the field people skip because it has a default of 250 cm. Measure it. In the corner, not in the living room, and under any lamp or beam.
5. Stairs and elevator: only if they're on the way. Leave the fields empty to skip them.
6. Safety clearance: 2 cm is fine for a careful move. If the hallway has radiators, door handles or picture frames, go to 5.

Then look at the Bottleneck and the How to carry it column. It tells you which side goes first and whether the sofa has to stand up or tilt, which is useful information for the delivery people too.

Be honest: what the tool can't see

• It thinks your sofa is a box. Real sofas have curved arms, soft cushions and legs. A sofa that's 2 cm "too big" might squeeze through with the cushions off; one that's 90 cm too big won't.
• The corner tilt is conservative. The tool assumes the sofa keeps one tilt angle for the whole turn. Experienced movers twist and re-angle as they go, so a borderline "no" can sometimes be a "yes" in real life. A big negative number is still a no.
• Stairs are a straight opening. Landings and turning staircases aren't modelled. If your stairs turn, run the corner check again with the landing width and the headroom above it.
• It doesn't know your hallway's stuff. Coat hooks, the shoe cabinet, the radiator and that lamp hanging at exactly the wrong height all count. Measure the free space, not the wall-to-wall space.
• People need room too. Somebody has to hold the sofa while it stands up. The clearance field helps, but it's not a replacement for common sense.

If a sofa fails at the corner, check the product page for a "modular", "split back" or "removable arms" version. Lots of big sofas come in two pieces precisely because of this corner.

Before you click "buy", open Will It Fit?, load the 3-seat sofa through a flat door and corridor example and put in your own numbers. Then change the ceiling height by 10 cm and watch what happens. It's the cheapest measurement you'll ever take.