Setting Up a Computer Desk Ergonomically: Height, Monitor and Posture

An ergonomic computer desk setup comes down to three measurements you can check in five minutes: the desk surface level with your forearms when your elbows sit at roughly 90 degrees, the top of the screen at or slightly below eye level, and the screen about an arm's length away. Get those three right and most of the discomfort people blame on long desk days is already addressed. This guide walks through each measurement, what the standard 750mm desk height does and does not fit, and how height-adjustable desks change the equation — using real, current specifications so you can check any desk against your own numbers. It is general comfort guidance, not medical advice.

This guide goes deep on the desk itself — height, monitor position, depth and the front edge. If you want a full room-by-room checklist that also covers the chair, lighting and budget tiers, see the single-person home office ergonomic setup checklist.

Desk height: start at your elbows, not the desk

Sit in your chair, relax your shoulders, and bend your elbows to roughly a right angle. The height of your forearms in that position is your correct desk height — everything else is an approximation of it. Fixed office desks, including Desk One's executive models such as the A003, are built at 750mm, a standard that suits many average-height adults once the chair height is set properly. The catch is that people are not standard: if you are shorter, a 750mm desk pushes your shoulders up; if you are taller, it pulls you into a hunch.

This is the practical case for a height-adjustable desk, independent of any standing-desk debate. Desk One's single motor sit-stand desks adjust from 700mm to 1150mm at 22mm/s, dual motor models from 700mm to 1200mm at 35mm/s, and the X-Series triple-stage frame reaches from 620mm up to 1270mm — a range wide enough to put the desktop exactly at elbow height for almost any user, seated or standing. The control panels store four memory presets, so once you find your correct seated and standing heights, returning to them is one touch rather than a daily guess. If your chair needs adjusting too, the separate guide on how to adjust an ergonomic office chair covers that side; this article stays with the desk.

Monitor position: getting height and angle right

The most common setup fault is a screen that sits too low, which drags your head forward and down for hours at a time. The widely used guideline is simple: sitting upright, the top of the monitor should be at or slightly below eye level, so your natural gaze lands in the upper third of the screen. Most monitors on their factory stands sit lower than that on a 750mm desk.

Two hardware fixes cover almost every case. A monitor riser gives a fixed lift — the Solid Wood Monitor Riser in walnut is 800 x 200 x 100mm, raising the screen 100mm and clearing storage space underneath. An adjustable arm gives a variable lift: the DeskOne Dual Monitor Arms hold two screens from 13 to 32 inches, up to 10kg per arm, each on full-motion joints that adjust height, tilt, swivel and rotation independently, clamped to the desk edge without drilling. Arms earn their keep in dual-screen work, where the second monitor should angle inward around you rather than sit flat; if that is your situation, the dedicated guide to dual and multi-monitor desk setups goes deeper on layout.

Screen distance and desk depth

Arm's length is the standard starting distance — sit back, extend your arm, and your fingertips should roughly reach the screen. For most adults that is somewhere around 500-750mm, adjusted until text is comfortable to read without leaning in. Desk depth is what makes that distance achievable: Desk One's sit-stand tops are 750mm deep as standard across the 1200mm, 1500mm and 1800mm widths, which leaves room for the monitor at the back edge, a keyboard in the working zone, and clear space in front of the keyboard to rest your forearms. On shallower desks, a monitor arm recovers depth by pushing the screen back past the desk edge.

Keyboard, mouse and the front edge

With desk height set at elbow level, your forearms should approach the keyboard flat, wrists straight rather than cocked upward. Keep the keyboard close enough that your elbows stay by your sides, and the mouse directly beside it at the same height — a mouse placed too far away twists the shoulder outward all day. The front edge of the desk matters more than most people expect: a hard square edge presses into forearms during long sessions. Desk One's C-Series tops are cut with a curved front profile and the U-Series with a deeper U-shaped recess, both designed so the desk follows the arc of your reach and softens contact under the wrists. These are comfort refinements layered on top of correct height, not substitutes for it.

Change posture through the day

Even a perfectly measured position becomes tiring if you hold it for eight hours, and the most robust habit is simply to vary posture. This is where sit-stand desks are genuinely useful: alternating between saved seated and standing heights takes seconds — dual-motor frames travel at 35mm/s with operation under 50dB, quiet enough to raise the desk during a call. Some models add a sedentary reminder that prompts a position change after a set period. Standing height follows the same elbow rule as sitting: raise the desk until your forearms rest level on the surface with shoulders relaxed. There is no single correct ratio of sitting to standing; the useful principle is that your next posture is the best posture, and a desk that moves makes changing effortless. You can compare the adjustable models in the computer desks collection.

The five-minute setup check

Run this sequence whenever you set up a new desk or feel your setup has drifted. One: chair set so feet rest flat and forearms are level at elbow height. Two: desk surface meeting those forearms — adjust the desk if it moves, the chair if it does not. Three: top of screen at or slightly below eye level, an arm's length away. Four: keyboard and mouse close, wrists straight, front edge not digging in. Five: if the desk adjusts, save the heights to memory presets so the setup survives being borrowed, bumped or cleaned. Five checks, five minutes, and the ergonomics of your desk stop being a matter of luck.

Frequently Asked Questions

What is the correct computer desk height in Australia?
Standard fixed desks, including Desk One's executive range, sit at 750mm, which suits many adults once the chair is adjusted so forearms rest level with the desktop. The more precise answer is personal: with relaxed shoulders and elbows bent at roughly 90 degrees, the desk surface should meet your forearms. If 750mm leaves you hunching or reaching, a height-adjustable desk lets you match the surface to your own elbow height.

How high should my monitor be?
The common guideline is the top of the screen at or slightly below eye level when you sit upright, so your gaze falls naturally on the upper third of the display. Most desktop monitors need a lift to get there — a 100mm riser or an adjustable arm both work. Laptop screens almost always sit too low on their own, which is why a separate keyboard plus a raised screen is the usual fix.

How far should I sit from the screen?
About an arm's length is the widely used starting point — roughly 500-750mm for most people — then adjust until you can read comfortably without leaning in. A 750mm-deep desktop, the standard depth across Desk One sit-stand tops, gives you enough room to place the monitor at that distance with the keyboard still comfortably in front of you.

Is a standing desk automatically more ergonomic than a fixed desk?
No — either can be set up well or badly. What an electric sit-stand desk adds is exact height matching and the option to change posture through the day. Desk One's single motor models adjust from 700mm to 1150mm, dual motor models from 700mm to 1200mm, and the triple-stage frame from 620mm to 1270mm, so both sitting and standing heights can be set to your own elbow level rather than a factory average.

What desk height range should short or tall users look for?
Check the range covers your elbow height in both sitting and standing positions. The wider the range, the more body heights it fits: a 700-1150mm or 700-1200mm frame covers most users, while the 620-1270mm triple-stage frame extends the range at both ends. Memory presets matter too — Desk One control panels store four positions, so a correct height only has to be found once.

Do curved desk tops make an ergonomic difference?
They change how the front edge meets your forearms. The C-Series curved top and the U-Series U-shaped top are cut so the desk follows the natural arc of your reach, and the softened front edge puts less pressure on the underside of wrists and forearms during long typing sessions than a square 90-degree edge. It is a comfort refinement rather than a requirement — good height and monitor position come first.