What's the Right Chair Height for Your Desk?

Chair height seems like the simplest adjustment on an office chair — just push the lever and float up or down. Yet it's the setting people most often get wrong, usually because they set the chair to the desk rather than to their own body. This short guide gives you a reliable, repeatable method to get your chair height right, along with what to do when your desk doesn't cooperate.

Why chair height matters so much

Your chair height sets the relationship between your body and two things: the desk surface (which affects your arms, shoulders, and wrists) and the floor (which affects your hips, knees, and lower back). Get it wrong and you'll either hunch your shoulders to reach a too-high desk or let your feet dangle and your back round. Because it influences so much, it's the first adjustment to make — everything else follows from it.

The step-by-step method

1. Set elbow height to the desk first. Sit close to your desk and raise or lower the seat until your forearms rest level with the desk surface, elbows bent at roughly a right angle and close to your sides. Your wrists should be straight when you type.
2. Now check your feet. With your arms correct, look down. Ideally your feet are flat on the floor and your thighs are parallel to the ground.
3. If your feet are flat — you're done. Your desk height happens to suit you.
4. If your feet dangle, your desk is on the high side and you've raised the chair to reach it. Add a footrest so your feet are supported and your thighs stay level.
5. If your knees are higher than your hips, the seat is too low for your legs; raise it and, if that lifts your arms above the desk, the desk is too low and may need raising on risers.

Getting the elbow angle right

The target is roughly 90 to 100 degrees at the elbow when your hands are on the keyboard, with your shoulders relaxed and down. If your shoulders rise toward your ears, your work surface (or your armrests) is too high. If you're reaching down, it's too low. This neutral arm position protects your shoulders, wrists, and neck over a long day.

When the desk is the problem

Most desks are a fixed height designed for an "average" person, which means many people can't get both their arms and feet right at once. You have a few options:

• Desk too high: raise your chair to fix your arms, then add a footrest to support your feet.
• Desk too low: raise the desk on sturdy risers, or use a chair that goes lower while keeping your feet flat.
• Height-adjustable desk: set the desk to your seated elbow height with your feet already flat — the ideal scenario, and one reason sit-stand desks are popular, as we discuss in standing desk vs sitting.

Don't forget the screen

Once your chair height is set, your eye level changes, so re-check your monitor: the top of the screen should sit at or just below eye level. Chair height and screen height work together, which is why we treat them as a pair in our monitor and chair setup guide.

A quick test you can do right now

Here's a fast way to sanity-check your current height. Sit at your desk as you normally would and rest your hands on the keyboard. Without changing anything, glance at your elbows and your feet. If your wrists bend upward to reach the keys or your shoulders feel lifted, you're sitting too low for the desk. If your feet are dangling or only your toes touch the floor, you're sitting too high for your legs. Either observation tells you exactly which adjustment — chair height, a footrest, or the desk itself — to reach for first.

Re-checking your height when things change

Chair height isn't a set-and-forget number. It's worth re-checking whenever something in your setup changes: a new desk, a different chair, switching between a home and office workstation, or even a change of footwear, since thick soles effectively raise the floor. Each of these alters the relationship between your body, the desk, and the ground, and a height that was perfect at one desk can be wrong at another.

If you move between two regular workstations, take a moment to note the correct settings for each. Many chairs have visible markings or you can simply remember the feel. A minute spent resetting the height saves hours of low-grade discomfort, and it ensures every other adjustment — which all depend on getting the height right first — stays correct too.

Conclusion

The right chair height is the one that lets your forearms meet the desk and your feet stay flat at the same time. Set your arm position to the desk first, then solve your feet with a footrest if the desk is too high. It takes two minutes, it's the foundation for every other adjustment, and it's worth redoing whenever you change desks. For the full picture, fold this into our complete sitting posture guide.