Desk and Chair Height: Getting the Sitting Position Right

2026年10月21日

Most desk discomfort comes from one mismatch: the desk and the chair were never set relative to each other. Fix it with two rules — feet flat, forearms level.

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Cleo Green Bouclé Swivel Desk Chair — view product

The two rules

Chair first: seat height so both feet rest flat and knees bend at about 90 degrees. For most adults that is 42–48 cm.
Desk second: the work surface should meet your forearms when they hang relaxed at 90 degrees — roughly 68–74 cm for average adults, 72–76 cm for anyone over 180 cm tall.

If the desk is fixed and too high (common with older furniture at 76–78 cm), raise the chair and add a footrest; a footrest is cheaper than a new desk.

Standard numbers

Element	Typical range
Office chair seat	42–52 cm (adjustable)
Fixed writing desk	72–76 cm
Adjustable sit-stand desk	62–128 cm
Laptop keyboard surface	add a riser: screen top at eye level

Monitor and keyboard placement

Screen top at or slightly below eye level, about an arm's length (50–70 cm) away.
Laptop users: the keyboard and screen cannot both be right. A laptop stand plus a separate keyboard solves it for under the price of a new desk.
Keyboard depth: keep 10–15 cm of desk in front of the keyboard so wrists can rest, and 30 cm+ behind for the mouse arm.

Sit-stand desks: what changes

The standing position raises everything: a 180 cm user stands at a 110–115 cm desk height, far above the 74 cm sitting default. That span is the whole reason adjustable desks exist — fixed furniture cannot serve both positions. If you stand, the rules stay the same: elbows at 90 degrees, screen at eye level, and start with 15–30 minutes per hour rather than all-day standing.

For fitting a desk into a small room rather than setting it up, see the compact desk guide.

Adjusting the chair you already own

Before buying anything, run through this sequence — most discomfort is a setup problem, not a furniture problem.

Set the seat height so feet rest flat with knees at about 90 degrees.
Set the seat depth so there are two fingers of space behind the knee. Most chairs slide the seat pan forward or back.
Set the backrest height so the lumbar curve sits in the small of your back, not at the shoulder blades.
Set the armrests level with the desk surface, or remove them if they prevent you pulling close.
If the desk is now too high, add a footrest — that is cheaper than a new desk and solves the same problem.

Laptop-only setups

A laptop puts the screen and keyboard at the same height, which means one of the two is always wrong. The fix costs less than a desk:

A stand or a stack of books raises the screen top to eye level.
A separate keyboard and mouse at desk height restore the 90-degree elbow angle.
An external monitor at 50–70 cm distance removes neck flexion entirely — the single biggest improvement for anyone working eight hours a day on a laptop.

Movement matters more than any single number: change position every 30–45 minutes. A perfectly set chair sat in for four hours is still four hours in one position.