Feet Don't Reach the Floor at Your Desk? Here's the Fix
Dangling feet aren't just annoying. Here's why they strain your back and legs, and the two-step fix that takes about a minute.
You raise your chair until your arms sit comfortably at the desk, and your feet end up dangling, resting on tiptoe, or tucked up under you. If that's the daily routine, you're not imagining the problem, and you're far from alone. One reviewer put it plainly: at 5 foot 2, she couldn't fully plant her feet, and she felt the strain in her hips and lower back.
The good news is that dangling feet are one of the easiest desk problems to fix, and the fix takes about a minute once you know the two steps. Let me walk through why it happens, why it matters more than it looks, and exactly what to do, with the numbers for your body.
The short answer
If your feet dangle at your desk, the desk is too tall for your chair height. Fix it in two steps. First, raise your chair until your forearms are about level with the desk and your elbows open to roughly 90 degrees. That usually lifts your feet off the floor, which is expected. Second, add a footrest to fill the gap, so your feet rest flat and your knees bend near 90 degrees.
Why dangling feet actually hurt
When your feet hang, your body weight presses on the underside of your thighs and behind your knees, which reduces circulation and can pinch the nerves there (that's the numb, pins-and-needles feeling). With nothing to push against, your pelvis also rolls backward, so your lower back ends up carrying the load. That's why people feel it in the back and hips, not only the feet.
This is well documented. Cornell's ergonomics group notes that a chair that is too high "leads to increased pressure at the popliteal fold (underside of knees), decreasing blood circulation and increasing pressure on the nerve." The University of North Carolina's ergonomics guidance says the same thing in plainer words: setting a chair too high "places more pressure than necessary on the backs of the legs, reducing circulation." The University of Chicago frames the healthy version: when your feet are supported and the back of the knee sits slightly above the seat, it "allows the blood to circulate freely in the legs and feet."
None of these are dramatic on their own. The catch is that this is an all-day, every-day posture, so the pressure behind your knees and the backward tilt of your pelvis quietly add up. (If you get persistent numbness, tingling, or swelling, especially in one leg, that's worth a clinician's look rather than a footrest.)
The two-step fix
Step 1: set your chair for your arms, not your feet. Standard office desks are a fixed height, about 29 inches in the US, which is too tall for most women and a lot of men. So raise your chair until your forearms are about level with the desk and your elbows open to roughly 90 degrees. Yes, this usually lifts your feet off the floor. That is correct, and it is the part people get wrong: resist the urge to drop the chair so your feet reach, because then you are hunching up to a desk that is now too high, and you have just moved the strain to your shoulders and wrists.
Step 2: fill the gap with a footrest. Measure the distance from your soles to the floor. That gap is the footrest height you need. For most people it lands around 2 to 5 inches; if you are under about 5 foot 3, it is often 5 to 6. Set it so your feet sit flat, knees bend near 90 degrees, thighs stay roughly parallel to the floor, and your hips are level with or a little above your knees. Mayo Clinic puts the trigger plainly: use a footrest "If your chair is too high for you to rest your feet flat on the floor." In a pinch a sturdy box or a stack of books works, as Mayo notes, but it won't be as stable or as adjustable as a real footrest.
One honest caveat: a footrest is the fix for when you can't lower the desk. If your desk is height-adjustable, or you can fit a keyboard tray, lowering the work surface is the cleaner solution, and Cornell points out that most people who can set their chair correctly don't need a footrest at all. The footrest earns its place specifically when the desk won't budge, which, for a standard fixed desk, is most of the time.
Your exact numbers
The right footrest height depends on your height and your desk. A common rule of thumb is about 10 percent of your height, but the honest answer is geometric: set your chair, then measure the gap from your feet to the floor. That measured gap is your number.
Here is the catch with the calculators you'll find online: most ask only your height and hand back a range, which is the part you could already guess. The piece that actually creates your gap is your desk height, and that is fixed. Our Footrest Height Calculator takes both your height and your real desk height, then returns your target chair height, the resulting floor gap, and the footrest height to close it. If you would rather not get out a tape measure, start there. For the matching tilt, see the height and angle guide.
What to look for in a footrest for this
Not every footrest fixes dangling feet well. A few things matter:
- Enough height. Cheap footrests often top out around 3 inches, which is too short for petite users who need 5 to 6. Check the height range against your measured gap.
- Wide enough for both feet. Aim for about 16 inches across, so you are not balancing both feet on a narrow pad.
- A bit of tilt. A gentle 10 to 15 degree angle keeps your ankles comfortable over long sits.
- Stable and non-slip. It should not skate across the floor when you shift your weight.
A footrest that adjusts for both height and angle covers the widest range of bodies and desks, which matters most if more than one person uses the chair.
Short or tall: it is a little different
Short and petite: this is the classic case. Your chair bottoms out too high for the desk, so you need a footrest with real height range, often 5 to 6 inches or more. A taller, adjustable footrest is worth the extra over a thin fixed pad. (A dedicated short-person guide is on the way.)
Tall: for taller people it is less about reaching the floor and more about legroom and a place to change position and stretch your legs out. A footrest still helps, just for different reasons.
Is it actually bad, or am I overthinking it?
For an hour here and there, dangling feet are a minor annoyance. The reason it is worth fixing is that it is an all-day, every-day posture: the circulation pressure behind your knees and the backward pelvic tilt are small on their own, but they compound over months. It is a small, cheap fix for a problem that quietly stacks up. To be clear, this is everyday discomfort and strain, not an emergency. Persistent pain, numbness, or one-sided swelling deserves a clinician, not a footrest.
This gap is exactly what our KomfiNest Bamboo Foot Rest is built for: three height-and-tilt angles to match your gap, a 16-inch top wide enough for both feet, and solid bamboo rated to 250 lb so it stays put. If you have set your chair and your feet are still dangling, that is when a footrest earns its keep. Not sure you need one? The 60-second quiz will tell you.
One more thing: keep moving
Once your feet are supported, you have solved the height problem. The other half of sitting well is not holding any one position too long, so get up and move every half hour or so. Cornell's ergonomics group makes the point that over-sitting and over-standing are both hard on the body, and Mayo Clinic suggests breaking up sitting roughly every 30 minutes. A footrest fixes the setup; moving keeps it from going stale.
Frequently asked questions
Is it bad to sit with your feet dangling?
For short stretches, no. All day, it adds up: dangling feet press behind the knees and reduce circulation, and they tilt your pelvis back so your lower back takes the load. Support your feet on the floor or a footrest.
What should I do if my feet don't reach the floor at my desk?
Raise your chair so your forearms are about level with the desk, then add a footrest to fill the gap from your feet to the floor. Don't lower the chair to reach the floor, or you'll hunch up to a desk that is now too high.
How high should a footrest be for a short person?
Often 5 to 6 inches or more, versus 2 to 5 for taller users. Set your chair first, then measure the gap from your soles to the floor; that gap is your footrest height. Adjustable height helps.
Why is my chair too high and why do my feet dangle?
Standard desks are a fixed height of about 29 inches, which is too tall for most women and many men. To get your arms right at that desk you raise your chair, and that lifts your feet off the floor. A footrest closes the gap.
Should I lower my chair instead of using a footrest?
Only if you can also lower the desk or add a keyboard tray. If the desk is fixed, lowering the chair makes you reach up and hunch. Keep the chair set for your arms and add a footrest to support your feet.
Should your feet be flat on the floor when sitting?
Yes, flat on the floor or on a footrest, with knees near 90 degrees and thighs roughly parallel to the floor. If your feet only reach on tiptoe, your chair is too high for the desk and you need a footrest.
Sources & references
- Cornell University Ergonomics (CUergo): Ergonomics of sitting and Choosing a chair.
- University of North Carolina, Environment, Health & Safety: Office Ergonomics.
- University of Chicago, Environmental Health & Safety: Ergonomics FAQ.
- OSHA: Computer Workstations eTool, Chairs.
- Mayo Clinic: Office ergonomics: Your how-to guide.
- Canadian Centre for Occupational Health and Safety (CCOHS): Adjusting an office chair.
Nora Bennett, Ergonomics & home-office writer
Nora has spent 10+ years writing about workspace setup and testing desk gear for remote workers. She reads the primary ergonomics literature and builds real desks to see what holds up. She's a researcher and tester, not a clinician, so clinical claims here are attributed to named sources. More about Nora
This article is general ergonomics guidance, not medical advice. If you have persistent pain, numbness, or swelling, especially in one leg, please talk to a qualified clinician.