How to Set Your Desk and Chair Height for a Pain-Free Workday

Most desks and chairs are built to a single average size, which means they fit almost nobody exactly. If you’ve ever finished a workday with tight shoulders, a sore lower back, or wrists that ache from typing, the furniture height — not your posture discipline — is very often the actual cause.

The target: a neutral, relaxed position

The goal of a good desk setup is simple to state: your upper arms hang straight down from relaxed shoulders, your forearms sit roughly level with the desk, and your wrists stay flat rather than bent up or down while you type. When any of those three things is off, something else in your body has to compensate — usually your shoulders, neck, or lower back — and that compensation is what turns into pain by the end of the day.

Start from your elbow height, not the furniture

Rather than adjusting your body to fit a fixed desk, work the other way: figure out where your elbows naturally rest, and set the furniture to that. As a standing-height rule of thumb, your resting elbow height is roughly 65% of your total height. Seated, it’s roughly 43% of your height, because sitting lowers your whole upper body relative to the floor. A 175cm-tall person, for example, lands around 114cm of elbow height standing, or about 75cm seated — numbers that are easy to work out once, then apply to an adjustable desk.

Why the keyboard sits a little lower than the desktop

If your keyboard is exactly at elbow height, typing tends to push your wrists upward into extension, which is uncomfortable to sustain for hours. Dropping the typing surface a few centimeters below resting elbow height — either with a keyboard tray or by lowering the whole desk slightly below the calculated figure — lets your hands hover naturally over the keys with straight wrists.

Don’t forget the chair

Chair seat height matters just as much as desk height, and it’s often the one people never touch after unboxing. A commonly used rule of thumb puts seat height at roughly a quarter of your total height, which keeps your knees at close to a right angle with your feet flat on the floor. If your feet dangle or your knees are pushed up higher than your hips, the seat is set too high; add a footrest or lower the chair.

Putting it together for a sit-stand desk

If you switch between sitting and standing through the day, work out both target heights separately — they aren’t the same number scaled up or down, because your posture changes shape between the two. Most electric sit-stand desks let you save a preset for each, so once you’ve calculated the two figures, you only have to dial them in one time.

A starting point, not a fixed rule

These ratios are based on population averages, not a measurement of your specific torso and arm length, so treat the numbers as a first setting rather than a final answer. Sit or stand at the calculated height for a few days, and nudge it up or down by a centimeter or two until your shoulders feel genuinely relaxed and your wrists stay flat without you having to think about it. Small adjustments compound over a workday, so it’s worth the few minutes it takes to get close.

Common mistakes worth checking for

A few setup mistakes show up again and again, and each is easy to fix once you know to look for it. Armrests set too high push the shoulders up exactly the way an over-tall desk does, so if your chair has them, lower or remove them rather than resting your elbows on top. A laptop used directly on a desk, with no external keyboard, forces a choice between good screen height and good typing height — it can’t deliver both at once, which is why a separate keyboard and a raised laptop stand solve a problem a laptop alone cannot. And a chair pushed too far from the desk, to make room for crossed legs or a large keyboard tray, often ends up pulling the whole upper body forward into a slouch to reach the keys.

Reassess when your setup changes

A height that felt right for months can stop working the moment something else changes — a new chair, a different keyboard with a taller profile, or even a new pair of shoes that adds an inch to your standing height. It’s worth re-running the numbers any time a piece of the setup changes, rather than assuming the old settings still apply. It takes a couple of minutes and avoids weeks of low-grade discomfort before anyone thinks to question the height again.