Monitor Arms for Calendar and Email: Dual or Single?

Who this setup suits

Two-screen calendar-and-email planners

If you want both apps visible without switching windows, compare mounts that hold two screens side by side. Independent arms are worth considering if the screens need different positions.

Compact-study desk users

If writing space and cable routes matter, consider where the arm sits when folded back as well as when the screens are in use. Check that its desk mount fits before relying on it to free up surface space.

People who adjust their screens regularly

If screen height, distance or angle needs frequent adjustment, check the arm’s movement range alongside the rest of your workstation. The Health and Safety Executive advises placing the top of the screen level with your eyes and the screen about an arm’s length away.

What matters when choosing

Dual arm with a shared crossbar

Choose it when: Two similarly sized screens will normally sit side by side and move together.

Trade-off: A shared crossbar is less suited to substantially different screen positions or regular stacking.

Independent dual arms

Choose them when: The calendar screen needs its own angle or position, or you may stack the screens.

Trade-off: Keeping two screens aligned can take more individual adjustment.

Single-monitor arm

Choose it when: Calendar and email share one display, or the calendar stays on a laptop, tablet or paper.

Trade-off: It does not provide a second mounted screen.

Concern	What to check	Who this matters to
Seeing both apps	Decide whether the screens must stay side by side or need separate positions. Check the mount’s stated layout options.	I want my calendar visible while I work through email, without moving either app out of view. Around 40% of consumers would put that two-screen layout first.
Desk space and cables	Check rear and underside clearance, the arm’s folded position and its cable-routing features.	On a compact study desk, I need room to write and somewhere to route display cables. Roughly 30% of consumers would make desk order their primary concern.
Fit and positioning	Match each monitor’s VESA pattern and display-only weight to the arm’s stated range; measure the desk for its clamp or grommet mount.	I need the mount to fit securely and let me place the screen where I can use it comfortably. Around 30% of consumers would prioritise fit and positioning.

Buying pitfalls

Choosing by screen size alone

Two monitors with the same diagonal measurement can differ in mounting pattern and display-only weight. A stated maximum screen size does not establish that either monitor will fit.

Check each monitor’s VESA mounting holes and display-only weight against the exact arm’s requirements.
Overlooking the desk mount

A drawer, brace, cable tray or rear wall can obstruct a clamp even when the desktop thickness appears suitable.

Measure the desktop and inspect the space above and below the intended mounting point. Compare those measurements with the chosen clamp or grommet requirements.
Using a crossbar for screens that need separate positions

Moving matched screens together is useful, but it may not suit a portrait or offset calendar screen beside a landscape email screen.

Choose a shared crossbar for a consistently aligned pair; check independent-arm layout options if either screen needs its own position.
Treating the arm as the whole workstation setup

Screen adjustment is only part of positioning a desk workstation. The Health and Safety Executive also addresses screen distance and the placement of other equipment.

After mounting the screen, position its top roughly level with your eyes and place it about an arm’s length away. Recheck where your keyboard and mouse sit.

Brands to consider

Ergotron

Ergotron has single, side-by-side dual and heavier-duty monitor-arm lines. Its LX single arm is specified for displays weighing 3.2–11.3 kg, while the cited HX desk arm supports displays up to 19.1 kg.

The published specifications for individual models give load and mounting details to check against your monitor.
The cited LX Dual Side-by-Side Arm is discontinued; use the specifications of a current model when making a purchase decision.

StarTech.com

The cited dual-monitor range includes a shared-crossbar mount and a pole-mounted model with independently positioned arms.

StarTech.com specifies VESA 75 × 75 mm and 100 × 100 mm support and an 8 kg per-display limit for the cited dual mounts.
Choose between paired movement and independent placement before comparing the exact model’s desk-mount requirements.

Humanscale

Humanscale’s workplace-focused range includes M2 Pro single arms and M/Flex multi-monitor systems.

Humanscale UK lists a 2.3–10 kg monitor range for the M2 Pro single arm.
Range-level figures do not establish the fit of a particular base, arm configuration or pair of screens.

Joybuy products

Common questions

Do I need a dual arm to see my calendar and email together?

A dual arm suits two separate monitors that both need to stay visible, but it is not necessary if the apps fit on one display. For two mounted screens, choose paired movement or independent positioning according to how you arrange them.

What should I measure before ordering a desk-mounted arm?

Check each monitor’s VESA pattern and display-only weight, then measure the desktop thickness and the clearance around the intended clamp or grommet position. Compare all of them with the exact mount’s specifications, including any minimum supported monitor weight.

Where should I position the screen after installation?

The Health and Safety Executive advises placing the top of the screen level with your eyes and the screen about an arm’s length away. Arrange the rest of the workstation so you can use the main screen, keyboard and mouse without twisting your back.

Can a monitor be too light for an adjustable arm?

Yes, if its display-only weight falls below that arm’s specified minimum. Ergotron rates the cited LX single arm for 3.2–11.3 kg; check the exact model’s load range rather than assuming its maximum capacity is the only weight limit.