The WorkFit Corner Is Built for Corner Desks, and Ergotron Prints Two Different Minimum Depths
The largest keyboard platform Ergotron makes, on the one converter missing from its own corner comparison chart.
The numbers
- Worksurface: 36 x 23.6 in, widening to 44 in across the back
- Keyboard tray: 36 x 14.5 in, narrowing to 7.8 in at the ends
- Lift: 15 in, topping out at a 20 in worksurface height
- Capacity: 10 to 35 lb total, of which the shelf takes 5 lb
- The unit weighs 57.5 lb and ships at 76 lb
- Minimum desk depth: 24 in on the sales sheet, 20 in on the drawing
- Corner rating: absent. Ergotron grades six other converters for corners and not this one
- Warranty: five years on the sales sheet, and the model is absent from the warranty document
Verdict
Worth it if you have measured 24 in or more on the leg, and only then. This is the only converter anyone builds specifically for the shape of desk this site is about, and nothing else gives you a 36 in keyboard tray.
The standards failure I originally gave it does not hold. Ergotron has no products in the BIFMA Compliant register, so the check never applied.
What decides this purchase is the depth, and Ergotron publishes two different answers. The sales sheet says 24 in, the engineering drawing says 20 in, and neither says which axis it means. Measure the leg yourself. The warranty document Ergotron published in March 2026 does not name this model either, so get the five years in writing.
Two minimum depths, both of them Ergotron’s
The sales sheet says the Corner “fits surfaces as shallow as 24 in”. The engineering drawing, under a printed heading that reads Minimum Desk Dimensions, gives 20 in and 30 in. Four inches apart on the shallower figure.
That gap lands exactly where corner desks live. A corner desk has two legs and a diagonal between them, and a depth figure in a catalogue is not always measured on the leg. Measure the leg you intend to stand the converter on.
I cannot tell you which of Ergotron’s figures is right. The drawing does not say which axis each number belongs to, so 20 and 30 could be depth and width, or one figure per leg. Both readings hold up against the document. The worksurface is 23.6 in deep. On a 24 in desk that leaves under half an inch between the front of the converter and the front of the desk, and on a 20 in desk it hangs past the edge by more than three and a half inches at chest height.
The keyboard platform is the reason to want one
Ergotron calls this “the largest keyboard platform of any WorkFit converter” and the measurement backs it up. The tray runs 36 in wide against 28 in on the WorkFit-TX and 27.5 in on the TL. It is 14.5 in deep in the middle and tapers to 7.8 in at the ends, which is the shape you would draw if you wanted a keyboard and a mouse in front of you and your elbows over the two legs of a corner.
The tray does not move on its own. It rises and falls with the worksurface and sits fixed below it, somewhere between 4.3 and 5.35 in down depending on which document you read. On the TX the tray carries 3 in of separate travel, so if your keyboard height and your monitor height disagree, the Corner has no way to settle the argument.
The corner converter that is not on the corner chart
Ergotron publishes something no other manufacturer in this category does. Its desk-conversion comparison carries a row called Fits Corner Workspace, and it grades models against it: Yes for the WorkFit-Z Mini, the TL and the TX, Limited for the S, the LX and the A.
The Corner is not in that table, and it is missing from the category listing too, though its product page still loads and still carries the line about corner desk applications. Ergotron’s own store now bounces the product URL to a sale page.
That says nothing about how the thing is built. It reads like a product being quietly wound down, and the dealer channel agrees: street prices run from roughly $610 to $925 for the same part number, against a list of $454.50. When dealers are pricing above list and 51 per cent apart from each other, nobody is setting street price any more.
Five years, from the sales sheet only
The sales sheet says the Corner is “tested and guaranteed with a full five-year warranty”. The installation guide states no term at all and points at a URL. Ergotron’s warranty document, revised on 4 March 2026, opens by promising each product category its own term and then lists them: WorkFit-C, TeachWell, WorkFit-Z Mini, WorkFit Elevate, JUV, LearnFit. The Corner is not there. Neither is the TX, the TL or the T. There is no default term at the bottom to fall back on.
So the five years lives in marketing, and the document you would actually be handed if you ever claimed on it does not mention this product. This is the third Ergotron converter where I have found that gap.
What is wrong with it
Two minimum desk depths, four inches apart. Source: Ergotron’s sales sheet and Ergotron’s spec drawing, which disagree. The drawing also declines to say which axis its numbers describe.
No BIFMA test number anywhere. Source: what the manufacturer declines to state. Ergotron’s own sheet makes no standards claim. One dealer feed carries the bare word BIFMA with nothing after it, which is the same unnumbered claim I refused on the Fellowes Lotus.
Absent from Ergotron’s warranty document. Source: the warranty document itself, revised 4 March 2026. It lists six product families by name and this is not one of them.
Missing from the corner chart Ergotron wrote. Source: Ergotron’s desk-conversion comparison. Six converters are graded for corner use and the one named Corner is not among them.
The keyboard tray has no travel of its own. Source: what the manufacturer declines to state, plus a dealer that describes the tray as moving in tandem with the worksurface. The TX publishes 3 in of independent tray travel. Nothing equivalent appears for the Corner.
No manufacturer-hosted spec sheet. Source: media.ergotron.com, which returns 404 for the Corner while serving the TX and TL sheets fine. The three documents this page cites are Ergotron’s own, re-hosted by a dealer. If that dealer takes them down, the specs go with them.
Heavy, and awkward at the moment it matters. Source: the product sheet. 57.5 lb of converter has to be lifted onto the desk once, and a corner is the hardest place in a room to stand while you do it.
Who it fits
Buy it if you have measured 24 in or more on the leg you plan to use, you want a keyboard and mouse spread across the full width of a corner, and you are content that the five-year warranty lives on a sales sheet. Nothing else in the category gives you a 36 in tray.
Skip it if your leg measures under 24 in. Do not let the drawing’s 20 in talk you into it. The worksurface alone is 23.6 in deep, and a converter overhanging the front edge of a corner desk puts a hard corner at chest height in the exact spot you already have to squeeze past. The shallower converters exist for this reason.
Questions people ask
What is Ergotron part 33-468-921?
The WorkFit Corner Standing Desk Converter in black. It is the only converter Ergotron describes as designed for corner desk applications.
Is 33-444-921 the same product?
No. That part number is the WorkFit-TLE, a rectangular converter that has been discontinued. The two numbers sit close together and get confused, but the products are different shapes.
How deep does my desk need to be?
Ergotron gives two answers. The sales sheet says 24 in and the spec drawing prints 20 in. Measure the leg you intend to use, and treat 24 in as the safe figure, because the worksurface itself is 23.6 in deep.
How big is the keyboard tray?
36 in wide by 14.5 in deep in the middle, tapering to 7.8 in at each end. It is the widest tray Ergotron puts on a converter.
How much weight does it hold?
10 to 35 lb in total, with no more than 5 lb of that on the shelf. The lower figure is a minimum, and the gas spring needs that much load to hold its position.
Does it need power?
No. It runs on a gas spring with a hand lever. One dealer listing describes electric height adjustment, and that listing is wrong.
What is the warranty?
Five years according to the sales sheet. Ergotron’s warranty document, revised March 2026, does not name this model.
Is it BIFMA compliant?
There is no such thing as BIFMA certification. BIFMA does not test or certify products, it runs a public register of self-declared compliance, and Ergotron takes no part in it. The bare word BIFMA on one dealer feed names no standard and means nothing.
Can you still buy it?
Yes, though it is thinning out. Several dealers hold stock, one is down to a single unit, and Ergotron’s own store no longer sells it direct. Prices run from about $610 to $925 depending on the dealer.
Sources
- Ergotron, WorkFit Corner product sheet (PDF), the source for the 36 x 23.6 in worksurface, the 44 in maximum width, the 36 x 14.5 in keyboard tray with 7.8 in ends, the 15 in lift, the 20 in maximum worksurface height, the 57.5 lb product weight, the 76 lb shipping weight, the “fits surfaces as shallow as 24 in” figure and the five-year warranty statement. Ergotron’s document, hosted by a dealer, because Ergotron’s own media server returns 404 for it
- Ergotron, WorkFit Corner specification drawing (PDF), the source for the 20 in and 30 in figures printed under Minimum Desk Dimensions, the 10 to 35 lb combined capacity, the under-30 lb monitor limit and the under-5 lb shelf limit
- Ergotron, WorkFit Corner installation instructions (PDF), which states no warranty term and refers the owner to a web address
- Ergotron, WorkFit Corner product page, the source for “Designed for corner desk applications, the WorkFit Corner has more worksurface and the largest keyboard platform of any WorkFit converter”
- Ergotron, desk conversions comparison, the source for the Fits Corner Workspace row and for the WorkFit Corner’s absence from it
- Ergotron warranty, revised 4 March 2026 (PDF), checked for this model and for the TX, TL and T, none of which appear
- Connection, WorkFit Corner listing, the source for the unnumbered BIFMA claim, the gas spring description and the “moves straight up and down on your tabletop” wording, and one of the dealers holding stock on 6 August 2026
- ErgoDirect, WorkFit-TLE 33-444-921, the source for 33-444-921 being a discontinued rectangular converter rather than a Corner variant
- Work While Walking, Corner WorkFit review, the source for the $454.50 list price the current dealer prices are measured against
- Dealer prices and stock checked 6 August 2026 at Connection, Dell, B&H, ErgoDirect, Quill, Stands and Mounts and the Haworth store. The price band quoted spans those listings