Desk Height Calculator
A 175 cm (5 foot 9) person types most comfortably at a sitting desk around 73.5 cm and a standing desk around 108.5 cm. This desk height calculator turns your body height into recommended heights for your chair seat, sitting desk, and standing desk, using the standard ergonomic ratios that put your elbows at desk level with relaxed shoulders.
Quick answer
The goal is elbows at roughly 90 degrees with shoulders relaxed while your hands rest on the keyboard.
Recommended heights
Sitting desk 74 cm (28.9 in)
Chair seat
43.8 cm (17.2 in)
Standing desk
108.5 cm (42.7 in)
What this tells you
- •The goal is elbows at roughly 90 degrees with shoulders relaxed while your hands rest on the keyboard.
- •The chair seat should sit at about 25 percent of your height, so feet rest flat and knees bend at 90 degrees.
- •A sitting desk lands around 42 percent of your height, a standing desk around 62 percent.
- •These are starting points. Fine-tune a few centimeters either way until your wrists stay straight.
How to Use
- 1Enter your height in centimeters or inches.
- 2Read the recommended chair seat, sitting desk, and standing desk heights.
- 3Set your chair first, then bring the desk or keyboard tray to elbow level.
- 4If the desk cannot move, raise the chair and add a footrest to keep your feet supported.
How It Works
Formula
seat = 0.25 x height, sitting desk = 0.42 x height, standing desk = 0.62 x heightThese ratios come from anthropometric averages that place the desk surface at seated or standing elbow height. For a 175 cm person they give a 43.8 cm seat, a 73.5 cm sitting desk, and a 108.5 cm standing desk. Fixed office desks are usually 73 to 76 cm tall, which suits people around 173 to 180 cm, and everyone else benefits from adjusting the chair or the desk.
Calculation note: values are processed in the order shown above, using the current input units.
Worked Examples
175 cm (5'9") office worker
A standard 74 cm desk fits almost perfectly at this height.
160 cm (5'3") worker at a fixed desk
A standard 74 cm desk is about 7 cm too tall, so raise the chair and use a footrest.
190 cm (6'3") standing desk user
Tall users need standing desks that reach nearly 118 cm, above many models' maximum.
Desk Heights by Body Height
Recommended heights using the standard ergonomic ratios.
| Body height | Chair seat | Sitting desk | Standing desk |
|---|---|---|---|
| 155 cm (5'1") | 38.8 cm | 65.1 cm | 96.1 cm |
| 165 cm (5'5") | 41.3 cm | 69.3 cm | 102.3 cm |
| 175 cm (5'9") | 43.8 cm | 73.5 cm | 108.5 cm |
| 185 cm (6'1") | 46.3 cm | 77.7 cm | 114.7 cm |
| 195 cm (6'5") | 48.8 cm | 81.9 cm | 120.9 cm |
Turning the estimate into a workable setup
Start with the chair, not the desktop. Set the seat so your feet have stable support and your thighs feel comfortable. The calculated 25 percent ratio is an estimate of seat height, but seat cushions compress and shoe soles change the effective distance to the floor. If the chair must rise to meet a fixed desk, use a firm footrest rather than leaving your feet unsupported.
Next, bring the keyboard and mouse close enough that your upper arms can hang naturally. Your shoulders should not lift toward your ears, and you should not reach forward to type. A thick desktop, high keyboard, or tall armrest can interfere even when the desk surface matches the calculated height. A keyboard tray may solve that mismatch without replacing the desk.
For standing work, wear the footwear you normally use and set the surface near elbow height. Keep your wrists close to neutral and avoid leaning your weight through the desk edge. A floor mat, supportive shoes, or a small foot rail may make standing more comfortable, but none of those changes makes prolonged static standing ideal. Alternate positions and move regularly.
Monitor height is a separate adjustment. Place the screen where you can read it without repeatedly bending your neck or lifting your chin. Larger displays, bifocals, laptops, drawing tablets, and precision work can call for a different arrangement. A laptop used for long sessions usually needs an external keyboard and mouse so screen and hand height can be adjusted independently.
Treat the three outputs as first settings to test. Change one item at a time, work for a while, and notice whether you are shrugging, reaching, pressing the backs of your thighs, or bending your wrists. A small change of one or two centimeters can matter. Comfort can also vary between typing, handwriting, gaming, drafting, and other tasks.
Common mistakes
- Setting the desk to fit the monitor instead of the elbows. Screen height is a separate adjustment, ideally with the top of the screen at eye level.
- Raising the chair without a footrest. Dangling feet load the back of the thighs and cut circulation.
- Setting a standing desk at knuckle height. It should meet your forearms with elbows at 90 degrees, several centimeters above where most people first put it.
- Copying another person's setup even when their body proportions, chair, keyboard, and tasks differ.
- Changing desk height without checking whether the keyboard, mouse, and armrests still allow relaxed shoulders.
- Standing in one fixed posture for hours instead of changing position and taking movement breaks.
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