Sofa Size Calculator
A sofa that fills every inch of the wall it sits against leaves no room to walk past or fit a side table, while an undersized one can leave a living room feeling sparse. Enter the length of your wall below to see the largest sofa that will fit comfortably.
Work out the largest sofa that will fit
Enter the length of the wall you want to place the sofa against.
Leaving 0.45m clear on each side for walking past and a side table, the largest sofa you should fit is:
up to 3.10m long
That's roughly a Large corner or modular sofa.
Recommended products
A few well-reviewed sofas for your living room.
- Fabric
- Small living rooms
- Grey
£449.00
Pros
- Sturdy beech wood frame with tapered legs
- Durable, easy-clean polyester weave fabric
- UK-built and delivered
Cons
- Flat-pack assembly takes two people
- Faux leather
- Small living rooms
- Brown
£279.99
Pros
- Wipe-clean faux leather
- Compact 2-seater footprint for flats
- Easy to assemble
Cons
- Firmer cushioning than fabric sofas
- Fewer colourways than some rivals — no navy option
- Velvet
- Family living rooms
- Emerald Green
£899.00
Pros
- Sturdy wood frame with soft-touch velvet upholstery
- Square-stitched, modern retro design
- Black wooden tapered legs
Cons
- Long lead time for delivery
- Velvet shows pile marks
Frequently asked questions
How much clearance should I leave around a sofa?
A good minimum is around 45cm on each side for a side table, lamp or simply walking space, so the sofa doesn't feel jammed wall-to-wall. In a room that also needs to function as a walkway, allow more.
Should I measure my doorways before buying a large sofa?
Yes — a sofa that fits the room perfectly is no good if it can't get through the front door, hallway corners, or stairwell. Check the delivery route width and any tight turns, not just the final room dimensions.
Is a corner sofa always better value for space?
Corner sofas maximise seating along two walls and can suit open-plan rooms well, but they take up a large single footprint that's hard to reposition later. In a squarer or smaller room, two smaller sofas or a 3-seater plus armchair setup can feel more flexible.
How far should a sofa be from the TV?
As a rough guide, sit around 1.5 to 2.5 times the TV's screen size away (in the same units) for comfortable viewing — for example, roughly 2-3m back from a 55 inch TV.