A sofa seat height is measured with nobody sitting on it, and the cushion is the only part of the seat that gives way, so the number on the listing is never the height you stand up from. Across the 147 sofas in this range, 99 publish a seat height and 53 publish a cushion thickness. Put the two together and more than a third of the advertised height, on the median sofa here, is foam.
Short answer. UK sofa seats are advertised at 37 to 50 cm, median 45 cm, measured to the top of an uncompressed cushion. Cushions here run 12 to 23 cm. Lose a quarter of that to your own weight and the seat settles 3 to 5.75 cm lower. Judge a sofa on its settled height, not its listed one.
Seat width decides whether two people fit, and we have already measured that across this range. Seat depth decides whether you can sit back without your feet leaving the floor, and the armchair guide works through the arithmetic. Seat height is the third number, and it is the one that decides whether you can get back up again. It is also the one most often misread, because the figure a listing gives you and the figure your body experiences are two different measurements of the same sofa.
Where is a sofa seat height measured from?
From the floor to the top of the seat cushion, with nothing on the cushion. That is the convention across the trade, and it is worth saying plainly because it is almost never stated on a product page. One retailer measurement guide puts it as bluntly as it can be put: a soft cushion may sit lower under your weight than its listed height suggests, and recommends recording the unloaded height and the height beside a seated person as two separate figures.
The UK furniture trade is not uniform about which of those two it publishes. Furniture in Fashion, whose reference chart we used when working out coffee table heights against the sofa seat line, tabulates its sofa figures explicitly as sofa seat height (compressed), in bands of 38 to 41 cm, 42 to 44 cm and 45 to 48 cm, and states that most UK sofa seat heights fall between 40 and 48 cm from the floor. Other guides give a standard band of 43 to 48 cm and mean the unloaded figure. Those two bands look almost identical and describe different sofas. A sofa advertised at 45 cm compressed and a sofa advertised at 45 cm unloaded are not the same product, and the gap between them is the whole subject of this article.
Everything in this catalogue is the unloaded kind. Every seat height in the sections below is the figure the supplier publishes, taken with the cushion at rest.
Why does the same seat height feel different on two sofas?
Because the number is a total, and totals hide their parts. A sofa seat height is three layers stacked on top of each other, and only the top one moves.
The Seat Stack. Published seat height = Leg + Frame + Cushion.
Leg is the gap between the floor and the underside of the seat box. It is rigid.
Frame is the seat box itself, the rigid deck the cushion sits on. It is rigid.
Cushion is the foam, springs and filling above the deck. It is the only layer that compresses, so it is the only one that is not really there when you are sitting on it.
Fifteen of the 147 sofas here publish all three layers, and they are built in wildly different proportions. The 212 cm corduroy three-seater has 5 cm of leg, 24 cm of rigid frame and a 16 cm cushion, adding up to a 45 cm seat. The 117 cm wingback two-seater has 24 cm of leg, a 23 cm cushion and 1 cm of frame between them, adding up to 48 cm. Across those fifteen, the rigid frame layer runs from 1 cm to 24 cm. One of these sofas is a box with a cushion on it; the other is a cushion on stilts. Nothing in either listing tells you which you are buying, and the seat heights are 3 cm apart.
Two real listings from this range. Both publish a seat height inside the comfortable band. The left-hand sofa puts 24 cm of that height into a rigid frame and 16 cm into cushion. The right-hand one puts 24 cm into legs, 23 cm into cushion and 1 cm into frame, so almost half of its advertised 48 cm is the part that gives way.
What is the soft share, and why does it matter?
Call the proportion of a published seat height that is cushion the soft share. It needs two published numbers, the seat height and the cushion thickness, and 47 of the 147 sofas here give both.
Across those 47 the soft share runs from 26% to 54%, with a median of 36%. Seventeen of the 47 are above 40% and fourteen are above 45%. On the median sofa in this range, over a third of the height you are quoted is the part that disappears under your weight. On the worst of them, more than half is.
Then the finding that makes the metric worth having. Across those 47 sofas, seat height and soft share correlate at minus 0.70. The lower the published seat, the greater the proportion of it that is cushion. The sofa that is already closest to being too low to rise from is also the one that will sink furthest when you sit down. The two problems are not independent; they compound, and they compound in the same direction every time.
Price pulls the same way, at minus 0.50. The dearer sofas in this range put their height into frame and legs. The cheaper ones put it into foam. That is not a quality judgement about the foam. It is an observation that a thick cushion is a cheap way to reach an advertised seat height, and a rigid seat box is not.
How far does a sofa actually settle?
The honest answer is that no listing tells you, because none of them publishes how firm the cushion is. But the foam industry has a reference point of its own. Indentation Load Deflection, the standard measure of cushion firmness, is taken by pressing a plate into a foam sample until it compresses to 25% of its thickness and recording the force needed. Twenty-five per cent is the industry's own definition of normal seating compression, and sofa seat cushions are typically specified at ILD 35 to 45.
So take a quarter of the cushion off the published seat height and call the result the settled height. Across the 47 sofas here that gives a drop of 3.0 cm to 5.75 cm, median 4 cm. It is an estimate, and we say so twice: it assumes every cushion behaves like the industry reference point, and a 20 cm pocket-sprung cushion will settle less than a 20 cm foam-only one of the same thickness. What it is not is a guess, because the 25% figure is not ours and the cushion thicknesses are the supplier's.
What happens to the comfortable band once the cushion settles?
This is where it stops being arithmetic and starts mattering. NHS occupational therapy guidance sets the target directly: the correct seat height is the distance from the floor to the crease at the back of your knees, with hips and knees at right angles and feet flat on the floor. Our armchair guide converted British adult measurements into a working band of 41.5 to 47.5 cm, which covers most of the population. Below it, standing up loads the knees and hips much harder; one UK occupational therapy practice puts it as additional strain on all joints and the cardiovascular system. Above it, your feet stop reaching the floor and you slide forward.
Of the 47 sofas that publish both numbers, 34 sit inside that band as advertised. Eight are already below it and five above. Now settle the cushions. Only 25 remain inside the band, 22 fall below it, and not one is left above it. Fourteen sofas, almost a third of the set, drop out of the bottom of the band between the listing and the living room.
The median tells the same story more quietly. Among the 47, the median published seat height is 46 cm, comfortably inside the band. The median settled height is 41.5 cm — exactly on the floor of it. The typical sofa in this range is not a comfortable sofa to stand up from. It is a borderline one, and it is sold as the former.
| Sofa | Published seat height | Cushion | Soft share | Settled height | 41.5-47.5 cm band |
|---|---|---|---|---|---|
| 4-in-1 Velvet Double Sofa Bed | 37 cm | 20 cm | 54% | 32.0 cm | Below |
| 130 cm Velvet 2-Seater, 21 cm padded seat | 41 cm | 21 cm | 51% | 35.8 cm | Below |
| 131 cm Velvet 2-Seater, pocket springs | 42 cm | 20 cm | 48% | 37.0 cm | Below |
| 225 cm Corduroy 3-Seater, pocket springs | 45 cm | 18 cm | 40% | 40.5 cm | Below |
| 212 cm Corduroy 3-Seater, pocket springs | 45 cm | 16 cm | 36% | 41.0 cm | Below |
| 117 cm Wingback 2-Seater | 48 cm | 23 cm | 48% | 42.3 cm | Inside |
| 132 cm Faux Leather 2-Seater | 46 cm | 15 cm | 33% | 42.3 cm | Inside |
| 135 cm Faux Leather 2-Seater | 46 cm | 12 cm | 26% | 43.0 cm | Inside |
Eight sofas from this range, ordered by settled height. The last column tests the settled figure against the 41.5 to 47.5 cm band, not the published one. Note the two faux leather two-seaters: the lowest soft shares in the set and the highest settled heights, despite neither having the highest published seat height.
Which sofas in this range sit firmest?
These are the eight with the lowest soft share — the sofas where most of the published height is structure rather than foam, and therefore the ones whose listed figure is closest to the truth. The faux leather two-seaters lead because a 12 cm cushion on a 46 cm seat is only 26% soft. Each card carries the published seat height, the cushion and the settled figure, and the row is ordered by the metric.
Sixteen sofas publish exactly 45 cm. Do they all sit at 45 cm?
No, and this is the clearest demonstration in the data. Sixteen sofas in this range publish a seat height of exactly 45 cm. Eleven of them also publish a cushion thickness, and those cushions run from 12 cm to 18 cm. Settle them and the eleven land at 40.5, 41.0, 41.3 and 42.0 cm — four distinct seated heights hiding behind one published number, spread across 1.5 cm of real difference and, more importantly, straddling the bottom of the comfortable band. Two of the eleven are inside it once settled. Nine are not.
The other five of the sixteen publish no cushion thickness at all, so nothing can be computed for them. They are in the carousel below, labelled honestly.
A single cluster could be a fluke, so here is the check: nine sofas publish exactly 46 cm and also give a cushion, running 12 to 18 cm, and they settle to between 41.5 and 43.0 cm. Same shape, same spread, one centimetre higher up. The pattern is not an artefact of one product family.
Which sofas settle the furthest?
The other end of the range, ordered by soft share descending. The five 4-in-1 velvet double sofa beds are the extreme case and also the exception the model fits worst: at 37 cm with a 20 cm cushion they are 54% soft, but they are floor-level convertible loungers whose seat doubles as a bed platform, so the comfortable-band test was never written for them. They are in the set because excluding an inconvenient row quietly is worse than naming it.
The listing worth staring at is the 130 cm velvet two-seater. It advertises 21 cm padded seat in its own product title, and its published seat height is 41 cm. The supplier has told you, in the name of the product, that half the seat height is foam. It settles to 35.8 cm, the second lowest figure in the whole computable set, and it is one of the better-selling shapes in the range precisely because a deep cushion looks generous in a photograph.
Why is a recliner seat higher than a sofa seat?
Because a recliner is designed to be stood up from and a sofa is designed to be sat back in, and the catalogue reflects that difference exactly. Of the 146 chairs in Recliner Chairs and Lift Recliners, 119 publish a seat height, running 38 to 52.5 cm with a median of 48 cm. Only one sits below 41.5 cm. Sixty-three of the 119 are above 47.5 cm — above the top of the comfortable band, deliberately, because an easier stand is worth more to that buyer than flat feet on the floor. The sofa median is 45 cm and the recliner median is 48 cm; that 3 cm is the whole design intent of the category.
There is one sour note. Only 3 of those 146 chairs publish a cushion thickness. The soft share cannot be computed for the furniture most often bought specifically because somebody is finding it hard to get out of a chair. A riser recliner removes the problem by lifting you, which is why the riser recliner guide exists and why the space a recliner needs is a separate question from the height it sits at. But for an ordinary fixed-back recliner, you are comparing published seat heights without being told how much of each is foam.
How do you check a sofa seat height before you buy?
Four steps, and the first two are the ones people skip.
One: get your own number. In socks, have someone measure from the floor to the crease at the back of your knee. That is your target, not an average. Two: find the cushion thickness on the listing, not just the seat height. On this range it will be there about a third of the time; the words to look for are seat thickness, seat cushion thickness or a phrase like 16 cm thick seat in the feature list. Three: subtract a quarter of the cushion from the published seat height. That is the settled figure, and it is the one to compare with your own measurement. Four: if the cushion is not published, assume a third of the seat height is foam — the median soft share here is 36% — and knock a quarter off that. On a 45 cm seat it comes to roughly 4 cm.
Two caveats worth carrying. A sofa that is 2 cm too low is a nuisance; a sofa that is 2 cm too high is a different nuisance, because your feet leave the floor and the seat edge presses behind your knee. And a seat height is only half of a sitting position: seat depth decides whether you can use the backrest at all, and a seat that is both low and deep is the hardest combination in the catalogue to get out of. If the sofa you want is 3 cm too low, taller feet or a firmer cushion will usually fix it, and a footstool will not — that changes your legs, not your hips.
What the listings do not tell you
Forty-eight of the 147 sofas here publish no seat dimension of any kind, so there is no height to check, settled or otherwise. Fifty publish no seat width. Not one publishes a cushion firmness, a foam density or an ILD figure, which is the one number that would turn the settled height from an estimate into a measurement. One line per listing — seat cushion: 16 cm, medium-firm — would close the gap entirely. Until it appears, the arithmetic above is the best a buyer can do, and it is a good deal better than reading the headline figure and hoping.
Frequently asked questions
What is a normal sofa seat height in the UK?
Most UK sofa seats sit between 40 and 48 cm from the floor. Across the 147 sofas in this range, 99 publish a seat height and they run from 37 cm to 50 cm with a median of 45 cm. That figure is measured to the top of an uncompressed cushion, so the height you actually sit at is lower.
Is a higher sofa seat easier to get out of?
Usually yes, up to a point. NHS occupational therapy guidance sets the target at the crease behind your knee with hips and knees at 90 degrees. Above that your feet stop reaching the floor and you slide forward. Below it, standing up loads your knees and hips much harder.
How do I measure the right seat height for me?
Stand in socks, have someone measure from the floor to the crease at the back of your knee, and use that number. It is the height at which your thigh is level and your feet are flat. Compare it with a sofa settled height, not the published figure.
Why does my sofa feel lower than the advertised seat height?
Because the advertised figure is taken with nobody on it. The cushion is the only part of the seat that compresses, and on the sofas here it is 12 to 23 cm thick. Lose a quarter of that to your own weight and the seat drops 3 to 5.75 cm below its listed height.
Does a thicker seat cushion mean a more comfortable sofa?
Thicker is softer, not necessarily better. Across the 47 sofas publishing both numbers, the lower the seat the thicker the cushion on it, at a correlation of minus 0.70. The sofas that are already hardest to rise from are also the ones that sink the furthest.
Why is a recliner seat higher than a sofa seat?
Because it is built to be stood up from. Of 146 recliner and lift chairs here, 119 publish a seat height, running 38 to 52.5 cm with a median of 48 cm, and 63 of those sit above the 47.5 cm top of the comfortable band. A sofa is built to be sat back in.
What should I do if the cushion thickness is not listed?
Assume roughly a third of the published seat height is cushion, which is the median across this range, and knock a quarter of that off. On a 45 cm seat that is about 4 cm. Only 53 of the 147 sofas here publish a cushion thickness, so this estimate is often the best available.
Can I raise a sofa that is too low?
Replacement or taller feet are the usual fix and are cheap, but they lift the whole frame and change how the seat relates to your coffee table. A firmer or thicker replacement cushion raises the settled height without touching the frame. A riser recliner solves it outright.
Shop sofas by the number that matters
Every sofa, loveseat and recliner in the range, with the published dimensions on each listing. Free UK mainland delivery, and seat dimensions stated where the supplier provides them.
Sofas & Seating Loveseats Recliner ChairsCatalogue figures from a live pull of all 147 products in Sofas & Seating, all 54 in Loveseats (a strict subset of the 147) and all 146 in Recliner Chairs and Lift Recliners on 1 October 2026, using the dimensions each supplier publishes in its own product description. The soft share and settled height are computed only on products that publish both a seat height and a cushion thickness, and the 25% compression figure is the Indentation Load Deflection reference point, not a measurement of any individual cushion. Seat height guidance from East Sussex Healthcare NHS Trust occupational therapy and The OT Practice; UK sofa seat height bands from Furniture in Fashion; measurement convention and the unloaded-versus-seated distinction from published retailer measuring guides. Related reading: seat width, seat depth, coffee table height, sofa beds, load ratings and recliner clearance.
