The stand that ships with a monitor is built to be cheap to pack and stable enough not to tip. It is not built around your desk. Whether that matters depends on three things: whether the desk changes hands or changes height, whether the stand's base is sitting where your keyboard wants to be, and whether you run two screens that need to meet at the edge. This article walks through those three questions, then shows you how to check your own monitor and desk so you don't buy an arm that doesn't fit.
The short answer
Buy the arm if any of these is true:
- You share the desk with someone else, or you switch between sitting and standing during the day
- The stand's base takes up space you want for your keyboard, notebook, or laptop
- You run two monitors and the gap or height mismatch between them bothers you
If none of those apply and the screen already sits at a height you like, the included stand is doing its job. Spend the money on something else.
The one condition on that verdict: an arm only helps if your monitor and desk can take one. The checks in the second half of this article come before the purchase, not after.
Stand vs. arm at a glance
| Question | Included stand | Monitor arm |
|---|---|---|
| Height adjustment | Some, often limited | Wide range |
| Desk footprint | A base under the screen | A clamp at the rear edge |
| Sit-to-stand changes | Re-adjust by hand | Swing and release |
| Two screens edge-to-edge | Bases collide | No bases; panels meet at the bezel |
| Install effort | None | Clamp, plate, cable routing |
| Fit risk | None | VESA, weight, desk |
The three questions
Does the desk change hands or change height?
A stand is set once and left alone. That is fine when one person uses it at one height. It stops being fine when a second person sits down and wants the screen lower, or when you raise a standing desk and the monitor that was at eye level is now at chest level.
An arm is the answer to a monitor that needs to move often. The common designs use a gas spring or a counterbalance, so you move the screen with one hand and it stays where you leave it. That is the difference between adjusting the monitor and not bothering.
If you sit at the same height in the same chair and nobody else uses the desk, this question is a no. Move on to the next one.
Is the stand's base stealing keyboard space?
Look at where your keyboard sits right now. If it is pushed forward because the stand's base is behind it, or angled because the base is in the way, the stand is costing you desk depth.
An arm moves the mounting point to the rear edge of the desk and lifts the screen off the surface entirely. The space under the monitor becomes usable. On a shallow desk this may be the change you notice most, even if the ergonomics were the reason you bought the arm.
If your desk is deep and the keyboard already sits where you want it, this question is a no.
Do two screens need to meet at the edge?
Two monitors on two included stands rarely line up. The bases are wider than the panels, so the screens cannot be pushed together without one base sitting on top of the other. The heights usually differ too, unless the monitors are identical.
With arms, the bases are gone. You can bring the panels to within a bezel's width of each other and match the heights by eye. You have two options:
- Two single arms. More freedom to position each screen independently. You need two clamp points on the rear edge.
- One dual arm. A single post with two arms. One clamp, and the screens share a mounting point, which limits how far apart they can go. Check the stated range for the two screens you own.
If you run a single monitor, this question is a no.
If you answered no to all three, stop here and keep the stand. If you answered yes to any, keep reading, because the next section is where an arm purchase goes wrong.
Before you buy: three things to check
VESA holes on the back of the monitor
VESA is the Video Electronics Standards Association, and the "VESA mount" is its standard for the pattern of threaded holes on the back of a display. Four holes in a square, and an arm's mounting plate bolts into them. The monitor's spec sheet lists the pattern as a hole spacing in millimetres, and the arm's listing names the patterns its plate fits.
Turn your monitor around or read the spec sheet and confirm three things:
- The holes exist. Some thin monitors and some all-in-one designs have no mounting holes. Adapter brackets exist for some models, but that is a separate purchase and a separate fit problem. Check before you assume.
- The pattern matches the arm. If the monitor lists a pattern, the arm's listing should name the same one.
- The plate can seat flat. On some monitors the holes are recessed or sit behind a curved back panel. If so, you may need spacers between the arm's plate and the monitor. The arm's documentation should say whether it ships with them.
The weight rating
An arm lists a weight range it supports. This is a range, not just a maximum. A gas-spring arm is tensioned for a band of weights; a monitor that is too light for the arm drifts upward, and one that is too heavy sags or won't hold position.
Find your monitor's weight without the stand in the spec sheet. The number with the stand is often the one printed prominently, and it is the wrong one. Then confirm that the stand-free weight falls inside the arm's stated range. If you're mounting two screens on a dual arm, check each screen against the per-arm rating, not the combined total.
The desk itself
This is the check people skip. An arm attaches to the desk in one of two ways:
- C-clamp. Grips the rear edge of the desk from above and below. No holes needed.
- Grommet mount. Bolts through an existing hole in the desk surface, usually a cable grommet.
For a C-clamp, check three things against the arm's listing:
Desk thickness. The clamp opens to a stated range. Measure your desktop and confirm it fits. A very thick butcher-block top or a very thin laminate top can fall outside the range.
Rear edge clearance. The clamp needs to reach under the desk at the back edge. A lip, a modesty panel, a cable tray, or a desk pushed flat against a wall can block it. Standing desks often have a crossbar or a control box under the rear edge; look under yours before you order.
Surface strength. The clamp concentrates the monitor's weight on a small patch of desk. Glass tops and thin particleboard are the ones to be careful with. If the desk maker says anything about clamp loads, read it. If the desk is glass, look for an arm that specifically says it supports glass or plan on a grommet mount with a reinforcing plate.
For a grommet mount, confirm the hole diameter against the arm's listing and that the hole is where you actually want the screen.
Who should keep the stand
An arm is not the right call for everyone who could technically use one.
- Your monitor has no VESA holes and you don't want to add an adapter bracket. The stand is the mount you have.
- Your desk can't take a clamp. Glass, a thin top, or no access to the rear edge, and no grommet hole to use instead. Fix the desk first or skip the arm.
- The screen is already where you want it. If you don't move it, don't share it, and the keyboard has room, an arm changes the look of the desk and not much else.
- You work mainly on a laptop with an occasional external screen. A laptop stand or a riser solves the height problem with less commitment.
- You want a bigger or better monitor. An arm repositions the screen you have. It does not improve it. If the real complaint is the panel, put the money there.
What to do next
Turn the monitor around and look for the four holes. Find the weight without stand in the spec sheet. Measure the desk thickness and look under the rear edge for anything that would block a clamp. Those three facts tell you which arms fit, and they take a few minutes to gather. With them in hand, you can shop for an arm the same way you'd shop for anything else: by fit first, then by price.