Not every monitor will mount on a dual monitor arm, but most will

A dual monitor arm will hold most modern monitors, but you need to check three things before you buy: whether your monitor has a VESA mounting hole pattern on the back, whether the arm's weight limit covers your monitor, and whether the monitor's size fits the arm's adjustment range. Many monitors do have VESA holes, but some curved monitors, ultrawide displays, and older flat-screens do not. If your monitor lacks VESA holes or is too heavy, you have other mounting options — but a standard dual arm will not work.

The good news is that checking compatibility takes about five minutes and requires nothing but your monitor's manual or a quick search. Most 24-inch and 27-inch monitors from mainstream brands like Dell, LG, ASUS, and BenQ have standard VESA holes and weigh well within the limits of typical dual arms. The incompatible monitors are usually specialty models — curved gaming displays, premium ultrawides, or older equipment — and you can spot them before you spend money.

Key Takeaways

  • VESA mounting holes are the standard way monitors attach to arms, and you can find them on the back of your monitor or in its manual — they are usually arranged in a square pattern of four holes.
  • Dual monitor arms have weight limits, usually between 7 and 15 pounds per monitor, so you need to know your monitor's actual weight before ordering.
  • Some monitors — particularly curved, gaming, or premium ultrawide models — use proprietary stands instead of VESA holes and cannot mount on standard arms.
  • If your monitor lacks VESA holes, you can sometimes buy a separate VESA adapter bracket that screws onto the monitor's existing stand.
  • The arm's reach and swivel range matter as much as the mounting pattern, because a monitor that technically fits may not position where you need it.

How to check if your monitor has VESA mounting holes

Look at the back of your monitor. Most monitors have four small holes arranged in a square pattern, usually in the center or lower section of the back panel. These holes are the VESA standard, and they come in specific sizes: 75×75 millimeters (the most common), 100×100 millimeters, or larger patterns like 200×200. The number tells you the distance between the holes in each direction.

If you cannot see the back clearly or the monitor is already mounted, check the manual or the manufacturer's website. Search for your exact monitor model and the word "VESA" — the spec sheet will list the pattern if it exists. If the manual says "proprietary stand only" or does not mention VESA at all, your monitor likely does not have the holes. Some monitors have VESA holes but also have a stand that blocks access to them. In that case, you can remove the stand (usually by unscrewing a few bolts underneath) and mount the monitor directly to the arm. Check the manual for stand removal instructions before you try.

Weight limits and why they matter

Every dual monitor arm has a maximum weight it can safely hold per monitor. Most arms support 7 to 15 pounds per side, though heavier-duty models go up to 20 pounds. If you mount a monitor that exceeds the limit, the arm will sag, drift out of position, or fail suddenly — and a monitor falling from an arm can break the screen or injure someone below it.

Find your monitor's weight in the manual or on the manufacturer's website. Search for your model number and look for "weight" or "specifications." The weight listed is usually without the stand, which is what matters for an arm mount. Add a pound or two if your monitor has a thick bezel or heavy materials, but do not guess — an arm rated for 10 pounds cannot safely hold an 11-pound monitor. If your monitor is too heavy for a standard dual arm, you have two options: buy a heavier-duty single-monitor arm for each display instead, or look for a monitor arm designed for larger or gaming monitors, which often support 15 to 20 pounds per side.

Curved and ultrawide monitors often do not fit standard arms

Curved monitors and ultrawides frequently use custom stands that do not have VESA holes, or they have VESA holes in unusual locations that do not align with standard arms. Some gaming monitors with aggressive curves or built-in RGB lighting use proprietary mounting systems that manufacturers designed to show off the monitor's design. Before you buy a curved or ultrawide monitor with the intention of mounting it on an arm, check the manual or product page for "VESA" or "VESA mounting."

If it says the monitor supports VESA, note the exact pattern (75×75, 100×100, etc.) and confirm the arm you are considering supports that same pattern. If the manual does not mention VESA, contact the manufacturer's support team directly — they can tell you whether an adapter exists or whether the monitor is arm-compatible at all. Some ultrawide monitors are so wide that even if they have VESA holes, a standard dual arm cannot position them safely. A 49-inch ultrawide, for example, may be too wide for the arm's horizontal reach or too heavy for its weight rating. In those cases, you would need a specialized ultrawide monitor arm, which is a single arm designed to hold one very large display.

VESA adapter brackets for monitors without holes

If your monitor does not have VESA holes but has a removable stand, you may be able to buy a VESA adapter bracket. These are metal plates that screw onto the bottom of your monitor's existing stand and add VESA holes where there were none. They cost between $15 and $40 and work well for monitors with flat, stable stands. An adapter only works if your monitor's stand has a flat surface you can screw into. If the stand is curved, has no screw holes, or is glued to the monitor, an adapter will not help.

Check your monitor's manual or contact the manufacturer to confirm whether an adapter exists for your model and whether it is safe to use. Even with an adapter, you still need to respect the arm's weight limit. The adapter itself adds a few ounces, so subtract that from the arm's rated capacity. If the arm supports 10 pounds and the adapter weighs 4 ounces, you have about 9 pounds and 12 ounces of actual capacity left for the monitor.

Monitor size and arm reach matter as much as VESA compatibility

A monitor can have VESA holes and still not work well on a dual arm if it is too large or too small for the arm's design. Most dual monitor arms are built for 24-inch to 27-inch displays. A 32-inch monitor might have VESA holes and fit the weight limit, but the arm's reach may not extend far enough to position it comfortably, or the monitor may be so large that it blocks your view of the other screen. Check the arm's specifications for "monitor size range" or "reach." Reach is the distance the arm extends from the wall or desk clamp — a typical dual arm reaches 15 to 20 inches forward.

If you have a 27-inch monitor and a 32-inch monitor, the 32-inch may extend past the arm's reach and hang awkwardly. Some manufacturers publish compatibility lists showing which specific monitors work with their arms; if your monitor is on that list, it is a safe choice. Before you order, measure your desk depth and the space where you want the monitors to sit. Make sure the arm's maximum reach does not push the monitors so far forward that they overhang the desk edge or block your keyboard and mouse.

What to do if your monitor is not compatible

If your monitor lacks VESA holes, is too heavy, or is too large for a standard dual arm, you have several alternatives. Single-monitor arms designed for heavier or larger displays often support 15 to 20 pounds and have longer reach. You can buy two of these instead of one dual arm, though they take up more desk space and cost more. Monitor stands with multiple tiers or shelves can hold two monitors without any VESA mounting. These sit on your desk and do not require any holes or adapters, though they take up more surface area than an arm.

Some people use one arm for a compatible monitor and a stand for the incompatible one. If you are buying a new monitor specifically to use with a dual arm, check the VESA specification and weight before you purchase. Many mainstream 24-inch and 27-inch monitors from Dell, LG, ASUS, and BenQ have standard VESA holes and fall well within typical arm weight limits. Avoid curved, gaming, or premium ultrawide models unless you have confirmed VESA compatibility with the manufacturer.

Frequently Asked Questions

Can I use a VESA adapter if my monitor does not have mounting holes?

Only if your monitor has a removable stand with a flat surface you can screw into. The adapter screws onto the stand and adds VESA holes. If your stand is curved, glued, or has no screw holes, an adapter will not work. Check your manual or contact the manufacturer to confirm whether an adapter is available for your model.

What if my monitor is heavier than the arm's weight limit?

Do not use that arm. A monitor that exceeds the weight limit will sag and eventually fail, and a falling monitor can break or cause injury. Buy a heavier-duty single-monitor arm for each display, or look for a dual arm with a higher weight rating.

Do all 27-inch monitors have VESA holes?

Most do, but not all. Curved gaming monitors, some premium models, and older displays may use proprietary stands. Check the manual or manufacturer's website for your specific model — do not assume based on size alone.

Can I mount a 32-inch monitor on a dual monitor arm designed for 24-inch displays?

Technically yes if it has VESA holes and fits the weight limit, but the arm's reach may not extend far enough to position it comfortably. Check the arm's maximum reach and monitor size range before you buy. A 32-inch monitor may overhang the arm or block your view of the other screen.

What is the most common VESA pattern?

75×75 millimeters is the standard for most 24-inch and 27-inch monitors. Larger monitors often use 100×100 or 200×200. Most dual monitor arms support multiple VESA patterns, but confirm the arm supports your monitor's specific pattern before ordering.