Desk height, when the desk doesn't adjust

A desk has exactly one job: hold your hands at a height where your shoulders can stay down. That’s it. Everything else it does — holding the screen, holding the paperwork — could be done by a shelf.

The problem is that most desks are built to a single fixed height, and that height was chosen by a furniture manufacturer to suit the taller portion of the people who might sit at one. If you aren’t in that portion, the desk is too high for you, and no chair adjustment can make a too-high desk into the right one — it can only move the problem to your feet.

The check

The desk’s height is not something you measure. It’s something you observe about your shoulders.

DESK HEIGHT — the check
  Chair at the height where your feet are comfortable.
  Hands on the keyboard where you'd actually type.

  · Forearms roughly level, shoulders doing nothing   → desk works
  · Shoulders drop when you deliberately relax them  → desk too high
  · Elbows below the desk edge, wrists angled up      → desk too high
  · Elbows well above the surface, wrists dropping    → desk too low
  · Desk edge pressing into your forearms             → desk too high

The relax-and-see-if-they-drop test is the one that matters, and it only works if you do it with your hands in the working position. Sitting back with your arms in your lap tells you nothing.

A too-high desk is much commoner than a too-low one, and it’s the one that hides, because the compensation happens at the shoulders where you don’t think to look. The pressure of the desk edge on your forearms is the other giveaway: if you’re resting on the edge, you’re using the desk as an armrest, which means it’s above where your arms wanted to be.

Four ways to change it

In order of how much they cost, which is roughly the reverse of how often people try them.

One: look underneath. A surprising number of fixed desks aren’t. Flat-pack desks frequently have leg assemblies with two or three sets of bolt holes; office desks often have adjustable feet with several centimetres of range; some have a leg-to-frame bracket that can be inverted. Get under the desk with a torch before you accept any other option on this list. It’s twenty minutes with an allen key and it’s free.

Two: raise the desk, if it’s too low. Blocks under the legs. Solid ones — offcuts of timber, a hardback book per leg, purpose-made risers if you want. The only real requirement is that all four end up the same and the desk doesn’t rock. Test it by leaning on a corner. This is the easy direction.

Three: lower your hands instead of the desk, if it’s too high. You can’t shorten most desks, but you can get your hands below the surface. A pull-out keyboard tray does this; so does a clamp-on tray; so, in a pinch, does putting the keyboard on your lap, which works better than it sounds if you don’t need to look at the desk. The point is that the surface height and your hand height don’t have to be the same number — the desk is only obliged to hold your hands where your arms want them if you insist on putting the keyboard on top of it.

Four: raise the chair and build a taller footrest. The default, and there’s nothing wrong with it. Chair up until the hands check passes, then a box under your feet to take the weight of your lower legs. The box gets tall and it looks improvised. It works, and the alternative is holding your shoulders up for eight hours. Chair height starts at the floor has the full version, including how to judge the height of the box.

What you should not do is raise everything on the desk to compensate. That’s the instinct — the desk feels wrong, so you change what’s on it — but if the desk is too high your hands are already too high, and putting the keyboard on a riser makes it worse.

The two heights problem

Here’s the part that’s genuinely awkward, and the reason desk height gets debated endlessly.

Your keyboard and your writing want different heights. Typing wants your hands at about the height where your relaxed forearms already are. Writing by hand, or sketching, wants a surface a bit higher, because you’re leaning on it and looking down at it. Reading a document wants something higher still, or angled. One fixed slab cannot be right for all three.

The way out is not to compromise on a middle height that suits nothing. It’s to make one activity the desk’s job and give the others an object:

• Typing is usually the majority activity, so the desk height serves the keyboard.
• Writing gets a pad or a slim board, which raises the writing surface a few millimetres and, more usefully, angles it.
• Reading gets a document holder, or a propped-up clipboard, or a closed laptop with the paper leaned on it. Anything that stops you looking straight down.

If your day is mostly handwriting rather than typing, invert this: set the desk for writing and put the keyboard on a tray.

When the desk can’t be the answer

Some desks are simply not workstations and never will be, and it’s worth recognising the category rather than fighting it.

Dining tables are built taller than desks, near-universally, because they’re designed for people to eat off with their arms up. If you work at one, you are almost certainly at a too-high surface, and the kitchen table setup is a specific enough problem to be worth its own treatment.

Desks with a fixed crossbar or a drawer pedestal in the wrong place may pass the height check and still fail, because you can’t get your legs under them properly, which stops you pulling the chair in, which pushes the keyboard away. Height is only one of the desk’s dimensions — the space underneath and how deep the top is both constrain the setup independently.

Standing desks solve the fixed-height problem by making it adjustable, which is genuinely the cleanest answer to this specific complaint. They also hand you a second setup to get wrong, and they cost money, which puts them outside the “work with what’s in the room” answer that everything above is.

What getting this right does and doesn’t do

Fixing the desk height removes one reason to hold your shoulders up. It doesn’t make sitting for hours a good idea, it doesn’t treat anything, and it won’t undo a day that was already uncomfortable. If discomfort is persistent, or involves numbness, tingling or weakness, that’s a matter for a clinician, not for an allen key.

Start under the desk. The bolt holes are there more often than anyone expects.