The Desk Height Nobody Can Change, and What the Chair Has to Absorb
Almost every fixed office desk is around 73 cm from floor to work surface. That is not a neutral number. Seated elbow height runs at roughly 0.42 of stature, which means a 73 cm desk is correct for somebody about 174 cm tall and progressively wrong for everybody else.
What the desk should be, by height
From the desk height calculator and the seat height calculator:
| Your height | Desk should be | Seat should be | Standard desk is | Verdict |
|---|---|---|---|---|
| 155 cm | 65.1 cm | 41.3 cm | +7.9 cm | desk too high |
| 165 cm | 69.3 cm | 43.8 cm | +3.7 cm | desk too high |
| 175 cm | 73.5 cm | 46.3 cm | -0.5 cm | about right |
| 185 cm | 77.7 cm | 48.8 cm | -4.7 cm | desk too low |
| 195 cm | 81.9 cm | 51.3 cm | -8.9 cm | desk too low |
At 160 cm the correct seated surface is 67.2 cm, so a standard desk sits 5.8 cm too high. At 190 cm it is 6.8 cm too low.
Why this becomes a chair problem
You cannot usually change the desk, so the chair goes up to meet it. That works for the elbows and breaks everything below them: raise the seat above its ideal 42.5 cm and the feet leave the floor, the thighs take the weight at the front edge, and circulation and lower-back support both suffer.
The fix is not to sit lower and shrug. It is to raise the chair to the desk and then put the floor back under your feet with a footrest — which is why footrests exist and why they are so often the missing piece in a setup that "feels wrong" without an obvious reason.
The order to set things up in
One: set the seat from your body, not the desk. The calculator's ideal for your height is the starting point — thighs roughly level, feet flat.
Two: check the desk against your elbows. Sitting properly, forearms should reach the surface at about 90° with shoulders relaxed.
Three: if the desk is too high, raise the chair and add a footrest. Not the other way round.
Four: if the desk is too low — the common case for taller people — raise the desk on risers. Sitting low to reach it drops the knees below the hips and rotates the pelvis backward, which is the posture the whole exercise is meant to avoid.
Five: only then the monitor. Screen position depends on where your eyes end up, so it is settled last rather than first.
Where the monitor lands
At 160 cm with a 24-inch screen, the monitor calculator puts the viewing distance at 70 cm; at 190 cm it is 84 cm. Both want the top of the screen at about eye level, so that the natural gaze falls slightly downward into the middle of the display.
A monitor too high is the commonest single fault in a home setup, usually because a laptop is sitting on the desk and the screen is attached to the keyboard. Those two want to be at different heights, which is the whole argument for a stand and a separate keyboard.
Standing changes the arithmetic entirely
Standing elbow height is about 0.60 of stature rather than 0.42, so the same 160 cm person wants 96 cm standing against 67.2 cm seated — a difference of 28.8 cm.
That gap is why a fixed desk cannot serve both and why a sit-stand desk has such a wide travel. It is also why "just stand at your normal desk" does not work: a 73 cm surface is far below standing elbow height for almost everyone.
How much standing is worth aiming at
The sit-stand calculator defaults to 15 minutes an hour, which over an 8-hour day is 2 hours standing and 45 minutes an hour seated.
Building up matters more than the total. Going from nothing to 4 hours a day in one step produces sore feet and a standing desk that quietly returns to sitting height within a fortnight. Start at 15 minutes an hour and add to it.
What none of these numbers know
They are ratios of stature, and people are not scaled copies of each other — leg length relative to torso varies considerably, and it is leg length that actually sets seat height. Treat every figure here as a starting point to adjust from, not a target to force.
The test is what your body does, not what the tape says: feet flat, thighs supported without pressure at the front edge, forearms level, shoulders down, and the top of the screen at eye level. If all five are true, the numbers were right enough.
The cheap fixes, in order of how much they buy
A footrest, if the desk forced the chair up. Perhaps the highest return of anything on this list, and the most often skipped because it looks like an admission of something.
A monitor stand or arm, so the screen height stops being decided by whatever the laptop happens to be sitting on.
Desk risers, if you are tall. Raising a 73 cm desk to 79.8 cm costs very little and removes the compromise entirely rather than shifting it somewhere else.
A separate keyboard, which is what makes the stand possible. A laptop used as a laptop puts the screen and the keys at the same height, and they want to be 8.4 cm or so apart in the vertical.
Checking the result
Run your own height through the seat height and desk height calculators, set the chair first, and then measure the surface you actually have. The gap between those two numbers is the thing the rest of the setup has to absorb — and knowing its size is most of knowing what to do about it.
If the gap is under about 2 cm, ignore it. Bodies are not that precise and neither are these ratios.
One last thing worth saying plainly: none of this is about buying a better chair. A moderate chair set up correctly beats an expensive one set to the wrong height, and the adjustment costs nothing. Most people who describe their chair as uncomfortable have never changed its height from the day it arrived, and the number it arrived at was chosen by a factory rather than by them.