Converters are the most misunderstood product in this category. They are sold as a cheap substitute for a standing desk, and for a lot of people they are exactly that. But the height they deliver is measured from the top of your existing desk, not from the floor — and that single fact decides whether the one you buy works or gets returned.
Do the arithmetic first
The calculation that decides everything
Your desk height + the converter's maximum lift = your standing keyboard height. A standard desk is about 29". Add the VariDesk Pro Plus 36's 17.5" and you get 46.5". If your measured standing elbow height is 48", that converter will never work for you, at any price.
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| Ergotron WorkFit-S | 18" in tandem, 23" monitor travel | about 47" | 6'6" and beyond |
| VIVO 36in Converter | 16.9" | about 45.9" | 6'1" |
| VIVO 32in Converter | 17" | about 46" | 6'1" |
| VariDesk Pro Plus 36 | 17.5" | about 46.5" | 6'2" |
Note how little separates them. Every platform here lands within three inches of the others, so the deciding number is your desk height, not the converter. Get your own number from the height calculator before you read another spec.
The three specs that matter
1. Lift height — the one above
Everything else is negotiable. If the converter does not reach your elbows, nothing about it can be fixed with an accessory.
2. Weight capacity — much tighter than you expect
Full desks are rated for 200 to 440 lb. Converters are rated for 24 to 44 lb. That is not a typo, and it is the second most common reason a converter disappoints. Two 27-inch monitors with their stands are commonly 24 to 36 lb together — already at or past the limit of every platform on this page before you add a keyboard.
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| VariDesk Pro Plus 36 Electric | 44 lb |
| VIVO 36in Converter | 33 lb |
| VIVO 32in Converter | 33 lb desktop, 4 lb keyboard tray |
| Ergotron WorkFit-S | 24 lb single (LD), 25 lb dual, on the height-adjustment assembly |
3. Footprint — the cost nobody quotes
A platform converter permanently occupies its own footprint on your desk, seated or standing. Vari recommends a 25.75" deep desk with clearance for the Pro Plus 36 to reach 17.5". If your desk is 24" deep, that is most of it gone.
These are two different products wearing the same category name.
- A platform sits on the desk and lifts a slab with your whole setup on it. Simple, stable, and it costs you desk depth and weight capacity.
- A clamp-on arm like the WorkFit-S bolts to the desk edge and holds the monitor and a keyboard tray on a column. It costs you no desk surface at all and reaches much higher — Ergotron publishes 18" of tandem travel with a further 5" of independent monitor adjustment, 23" of monitor travel in total.
The arm's hidden advantage is that monitor height and keyboard height move independently. On a platform they are locked together, which means a setup that is right for your elbows is often wrong for your eyes. For tall users that is decisive.
What we excluded
- Single-surface risers. A converter with no separate keyboard tier puts your keyboard at monitor height, which is the exact posture problem you bought it to solve.
- Z-lift converters that arc toward you. Some cheap designs swing forward as they rise, pulling the keyboard into your stomach at standing height. Look for vertical travel.
- Anything without a published weight limit. In a category where the limits are this tight, a missing number is disqualifying.
And be honest with yourself about whether a converter is the right purchase at all. If you are short, it is usually the wrong one — here is the full comparison.
If you have not decided whether a converter belongs in your setup at all, the honest case for and against one covers the depth and load limits that disqualify it. At the bottom of the budget it is usually the right answer outright, which what $200 actually buys makes the case for, and the desk-choosing process is the alternative route.
One machine changes the analysis enough to need its own page. An iMac weighs far less than any converter here can carry, but its stand is not height-adjustable and VESA is a configuration you choose at purchase rather than a retrofit — so the iMac ranking sorts on platform width and total screen height instead of on load.
If you would rather work the decision yourself than take a ranking, the six-step process starts with the two measurements of your own desk that disqualify most of this field before any specification matters.
Four checks before you order
Measure your desk depth, not just its height
Vari recommends a 25.75" deep desk for the Pro Plus 36. Many home desks are 24" or less. Measure before you buy, because a platform hanging over the front edge is both unstable and unusable.
Weigh your monitors
The manufacturer publishes the weight of your monitor, stand included. Add them up and compare against the converter's limit. This one check prevents most returns.
Check the desk edge if you want the arm
The WorkFit-S clamps. A glass top, a thick bullnose edge or a rear modesty panel can all make that impossible. Measure the thickness and the clear run along the back edge.
Plan for the seated position too
Most converters never drop flush — the VIVO 32in bottoms out at 6.5" above your desk. You are raising your seated keyboard height permanently, so raise your chair to match and add a footrest if your feet leave the floor.
