How to Measure for a Standing Desk: The Two Numbers That Decide Everything

There are two numbers that decide whether a standing desk works for you, and neither of them is the one printed on the listing.

The first is your seated elbow height. The second is your standing elbow height. If the desk cannot reach both, you have bought a desk that is correct in one position and wrong in the other, and the position it is wrong in is the one you will spend most of your day in.

This takes ten minutes and a tape measure, and it eliminates the single most common expensive mistake in this category.

Why the number on the listing misleads

Almost every frame in this market quotes its height range without a desktop. FlexiSpot lists the E7 at 22.8 to 48.4 inches and marks it "without top". UPLIFT quotes the V3 at 22.6 to 48.7 inches. Those are frame numbers.

A desktop adds its own thickness. A one-inch laminate top takes a 22.8 inch minimum to 23.8 inches, and a 1.5 inch solid wood top takes it to 24.3 inches. On the low end that matters enormously, because the people who need a low minimum are exactly the people a one-inch error excludes.

Read the range, then add your desktop thickness to both ends before comparing it against your own numbers. A surprising number of desks that look like they clear your requirement do not once you have done that.

Taking the two measurements

You need a chair you actually use, a tape measure, and shoes on if you normally wear them at your desk.

Seated elbow height. Sit in your working chair with your feet flat on the floor and your thighs roughly parallel to the ground. If your feet do not reach the floor, sort that first, because every measurement taken above dangling feet is wrong. Let your upper arms hang straight down and bend your elbows to about 90 degrees, forearms parallel to the floor. Measure from the floor to the underside of your elbow.

That figure is your seated desk height. Not approximately: the surface your hands work on should sit at that height, because that is the height at which your shoulders are not doing any lifting.

Standing elbow height. Stand normally, weight even, shoulders relaxed rather than pulled back. Same 90 degree elbow bend, forearms parallel to the floor. Measure floor to underside of elbow.

That is your standing desk height.

For most adults these two numbers are somewhere between 25 and 31 inches seated and 38 to 47 inches standing, but the range across real people is wider than any listing assumes, and yours is yours.

What you measured	What it becomes	Why it moves
Seated elbow height	Your minimum required desk height	Add nothing. This is the surface height, and the desktop thickness comes out of the frame's range
Standing elbow height	Your maximum required desk height	Same. The frame has to reach this WITH the top on
Desktop thickness	Added to both ends of any quoted frame range	Frames are quoted bare. A 1 in top raises the floor by 1 in
Keyboard height, if using a tray	Subtract tray drop from your seated number	A tray that drops 3 in means the desk surface can sit 3 in higher

The comparison that actually matters

Write down two numbers: your seated elbow height, and your standing elbow height. Then for every desk you are considering, take the quoted frame range and add the desktop thickness to both ends.

A desk works for you if its adjusted minimum is at or below your seated number and its adjusted maximum is at or above your standing number.

Worked example. Somebody with a 25.5 inch seated elbow height and a 43 inch standing elbow height is looking at a frame quoted 22.8 to 48.4 inches with a one inch top. Adjusted, that frame delivers 23.8 to 49.4 inches. Both requirements clear comfortably, with about 1.7 inches of spare travel at the bottom. That is a desk that fits.

Change one variable. Somebody with a 23 inch seated elbow height, which is not unusual for a shorter adult, is now asking for a surface at 23 inches from a frame whose adjusted minimum is 23.8. That desk is permanently an inch too tall in the seated position, and an inch at the elbow is enough to keep the shoulders slightly shrugged all day. This is the failure the listing will never warn you about.

The three-stage question

Frames come in two-stage and three-stage versions, meaning two or three telescoping leg sections. The practical difference is travel range.

A two-stage frame typically gives you something in the region of a 19 inch span. A three-stage gives more, and it gets there while also being able to go lower. Autonomous publishes both for its Desk 2: the two-stage frame at 27.2 to 46.5 inches without a top, the three-stage at 26.2 to 52 inches, with weight capacity rising from 250 to 310 lbs at the same time.

The Desk 2 listing is worth looking at directly, because it demonstrates the arithmetic above better than any argument for it. Autonomous publishes two height ranges for the same two-stage frame, labelled and 1.1 inches apart: 27.2 to 46.5 inches without a top, and 28.3 to 47.5 inches with the one-inch top on. Both numbers are true. Quote the wrong one at yourself and you have moved your own minimum by more than an inch, in the direction that decides whether a shorter adult can reach the desk at all.

That is the whole reason to check which number a listing is giving you before comparing it to your elbow height. Note also that Autonomous states the three-stage range only in its feature list, alongside the with-top figure, and publishes no without-top equivalent for it, so the two frames are not quoted on the same basis.

If both your numbers sit comfortably inside a two-stage range, the extra spend on three stages buys you nothing you will use. If either number is near an edge, three stages is not a luxury, it is the thing that makes the desk usable.

What the measurement does not tell you

Two things, and both matter.

Depth. Your elbow height sets the desk height. It says nothing about whether the desk is deep enough to put your monitor at the viewing distance the guidance calls for, which is 20 to 40 inches from your eye. A 24 inch deep desk with a large monitor pushed to the back edge is often still too close, and that is a depth problem no height adjustment solves. It is also the first thing to check on a small standing desk.

Stability at your standing height. A desk is least stable at full extension, which is exactly where you want it while typing. The specification that predicts this is not the height range, and what predicts wobble is worth understanding before you order.

After it arrives: set it once, properly

Raise the desk to your standing number, stand at it, and check three things. Forearms parallel to the floor. Shoulders down, not shrugged. Wrists straight rather than bent up over the front edge.

Then lower it to your seated number and check the same three things sitting down. If both are right, save the presets and stop adjusting. The most common post-purchase error is treating the memory buttons as a fine-tuning exercise rather than two fixed positions arrived at by measurement.

And having got the height right, the remaining question is how much of the day to spend at each one. The trial evidence on that is more specific than most people expect, and considerably less demanding.

Questions people actually ask

What height should a standing desk be for someone 5 foot 10?

There is no answer that works from height alone, because torso and arm proportions vary substantially between two people of the same stature. Measure your standing elbow height with shoes on and use that number. Published height-to-desk tables are averages, and an average is exactly the wrong tool when the cost of being an inch out is a permanently shrugged shoulder.

Do I add the desktop thickness to the frame range or subtract it?

Add it to both ends. A frame quoted 22.8 to 48.4 inches with a one inch top gives you a working surface at 23.8 to 49.4 inches. The number that matters is the surface height, and the frame numbers are quoted bare.

What if my seated and standing numbers need more range than any desk has?

That is rare with a three-stage frame, and where it happens the usual fix is a keyboard tray. A tray that drops three inches below the surface lets you satisfy the seated requirement with a desk whose minimum is three inches too high.

Should I measure with shoes on?

Measure the way you work. If you wear shoes at your desk, measure in them, and if you stand on an anti-fatigue mat, measure standing on it. A three-quarter inch mat raises you three-quarters of an inch, and that comes off the top of your standing requirement.

Is a two-stage frame enough?

It is if both your numbers sit inside its adjusted range with room to spare. Check the arithmetic rather than the marketing. Three-stage frames buy travel and usually more weight capacity, and neither helps if you were never going to use the extra range.

Sources

• Frame height ranges taken from the manufacturer specification pages for the FlexiSpot E7 (flexispot.com), UPLIFT V3 (upliftdesk.com) and Autonomous Desk 2 (autonomous.ai), read March 2026.
• Working posture guidance, including the 20 to 40 inch viewing distance: OSHA Computer Workstations eTool.
• ANSI/BIFMA G1-2013 is the ergonomic height standard manufacturers cite when they claim a range fits a given percentage of users.