Desktop converter standing desks

The Z Mini is the small one: 31 inches wide, 15.8 deep, 12.5 inches of straight-up lift on a Z-shaped frame with a hand-brake lever. Because the lift is vertical rather than arcing forward, it does not sweep across your desk as it rises, which matters when the desk is small enough that something is always in the way. The limits are honest and severe. Twelve and a half inches of lift is not enough to reach a comfortable standing height for most people from a normal 29-inch desk — by the standing-elbow rule its 42.5-inch ceiling suits someone around 5 ft 8 in and nobody taller — and 25 lb covers a laptop or one 24-inch monitor. It is the right product for a laptop user in a small space who wants to stand for twenty minutes at a time, and the wrong one for a permanent workstation.

Best for: A laptop user in a small space who wants to stand occasionally rather than all day.

The TX is the converter that solves the two problems most risers have. It rests only two inches above the desk when lowered, so it does not permanently raise your keyboard when you are sitting — most converters add three or four inches you can never get rid of. And its keyboard deck hangs below the work surface and tilts back, keeping the monitor-to-keyboard relationship correct as the whole thing rises, where a single-shelf riser puts your keyboard and screen at the same height and forces you to look down at both. The X-shaped lift is spring-assisted, so it moves with one hand and needs no power. What it cannot do is lower your sitting height, because it sits on the desk you already have. The 40 lb rating covers a single monitor up to 30 inches and a laptop, not a dual-arm setup.

Best for: A fixed or rented desk where the sitting position must stay untouched.

A converter sits on the desk you already have and raises the keyboard and monitor above it. That makes it the right answer in exactly two situations: a rented or fixed desk you cannot replace, and a room where a second full desk will not fit. The Pro Plus 36 Electric is the powered version of the converter that made VariDesk a household name — two tiers, 36 inches wide, a button instead of the squeeze handles, and it arrives ready to use. What a converter cannot do is lower your sitting height. It sits on top of a desk that is whatever height it is, usually 29 inches, so if sitting at your current desk is uncomfortable a converter will not fix it; it only adds a standing position. The 44 lb capacity is also the real constraint — that is one monitor and a laptop, not two 27-inch panels on an arm.

Best for: A fixed or rented desk, or a room that cannot take a second full-size one.