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If your feet don’t rest flat on the floor once your chair is at the right height for your desk, a footrest is solving a real problem rather than adding an unnecessary accessory. If your feet already sit flat with your knees at roughly a right angle, you likely don’t need one, and adding a footrest anyway can actually push your posture in the wrong direction.
The test takes about thirty seconds. Sit at your desk, adjust the chair until your elbows land near 90 degrees at the keyboard, then look down. Feet flat and grounded, no footrest necessary. Feet dangling, toes barely grazing the floor, or knees pushed up higher than your hips: that’s the gap a footrest is built to close.
The quick way to check
Most of the “do I need one” confusion comes from adjusting the chair for the desk instead of the desk for the body. Once the seat is high enough to put your forearms level with the keyboard, shorter users especially end up with their feet hovering an inch or two off the ground. That’s not a comfort preference at that point. It’s a straightforward measurement gap between chair height and leg length.
A rough guide: if you’re under about 5’4″, there’s a good chance a standard office chair, even at its lowest setting, still leaves your feet short of the floor once it’s raised to match a fixed-height desk. That’s exactly the population our guide to office chairs for shorter people is written for, and it’s worth reading before you assume a footrest is the only fix.
| Sign | Usually means |
|---|---|
| Feet dangle or barely touch the floor | Footrest likely helps |
| Knees higher than hips when seated | Footrest likely helps |
| Feet flat, thighs roughly level with the floor | Probably don’t need one |
| Chair won’t lower enough for the desk at all | Chair or desk problem, not a footrest problem |
What a footrest is actually doing mechanically
A footrest raises the floor to meet your feet, not the other way around. It lets you keep the chair at the height your desk and keyboard need while still giving your legs somewhere solid to rest, instead of leaving them hanging or forcing you to slouch down to plant them. Some models tilt or rock slightly, which some users say helps them shift position through the day rather than locking the foot in one spot for hours.
It’s a workaround for a height mismatch, not a posture upgrade layered on top of an already-correct setup. If your feet are already flat and grounded, adding a footrest under them tends to push the knees up above hip height instead, which is the same problem you were trying to avoid, just moved.
When it’s really a chair or desk problem
Sometimes the honest fix isn’t a $30 footrest, it’s that the chair can’t go low enough or the desk can’t go high enough to fit the person using it. If your chair is already at its lowest setting and your knees are still jammed up near the desk drawer, a footrest won’t undo that. A chair with a genuinely lower seat-height range, or a desk set a couple inches taller, addresses the root mismatch instead of compensating around it. Our general ergonomic desk setup guide walks through how desk height, chair height, and the rest of the setup are supposed to line up with each other.
Standing desks change the question entirely
Once you’re standing, the footrest question flips. A flat footrest isn’t really the tool here. What people report using instead is an anti-fatigue mat, or a small rocker-style rail that lets one foot rest slightly raised at a time so weight shifts rather than staying locked on both feet for an hour straight. If you’re deciding between a standing desk converter and committing to a full sit-stand desk, that decision affects this too, since converters sit on top of an existing desk and change the standing height math. Our comparison of a standing desk converter against a full standing desk covers which setup tends to make more sense for a given budget and space.
Alternating between sitting and standing through the day is its own separate question with its own guidance, covered in how often people are generally advised to get up from a desk chair.
What to look for if you decide you need one
Width matters more than most buyers expect. A footrest narrower than your own foot placement forces an unnatural, pinched stance rather than a relaxed one. A slight forward tilt (5 to 15 degrees is common on rocking models) suits people who like shifting position; a flat, stable platform suits people who just want somewhere solid to plant both feet. Height adjustability is worth checking too, since a single fixed height rarely fits both a 5’1″ and a 6’1″ household member equally well. Search results for under-desk footrests turn up a wide range of tilt and height options if you want to compare specs side by side before deciding.
Materials and firmness, and why cheap ones sometimes get returned
Return-reason patterns on major retail sites point to a couple of recurring complaints with budget footrests. A hard plastic surface with no texture tends to feel slippery in socks or stockinged feet, which some owners describe as more distracting than helpful. A textured or slightly cushioned top, often a molded foam or a ridged rubber surface, gets better marks for staying put and feeling less like standing on a hard shelf. Weight and base grip matter too. A lightweight footrest without rubber feet can slide on hard flooring every time you shift your legs, which defeats the purpose fairly quickly.
Size on paper doesn’t always match size in practice. A footrest listed as “compact” might still be too tall for someone with shorter legs and a lower desk, since the platform height needs to match how far your feet actually hang once the chair is set correctly. Checking the listed height range against your own measured gap, rather than trusting a generic product photo, avoids most of the sizing mismatches that show up in return comments.
When a footrest won’t solve what’s actually going on
If your feet not touching the floor is only one symptom among several, ongoing lower back tightness, numbness in a leg, or pain that doesn’t ease up once your setup is corrected, that’s outside what a footrest, or any desk accessory, is built to address. A physical therapist or occupational health provider can look at the whole picture in a way a checklist can’t.
Verdict
Sit at your desk with your elbows at 90 degrees and look down. If your feet aren’t flat, a footrest is a cheap and reasonable fix. If they already are, save the money and look at your chair or desk height instead.
Do I need a footrest if I’m of average height?
Usually not. Footrests solve a height mismatch, most often for people shorter than the desk and chair were designed around. If your feet already sit flat on the floor once your chair is adjusted for your desk, a footrest doesn’t add much and can push your knees above hip level instead.
Can a footrest fix bad posture on its own?
No. It closes a specific gap between chair height and floor, which can support a better overall position, but it isn’t a general posture tool. If the chair, desk, or monitor height is still wrong, a footrest alone won’t correct the rest of the setup.
Should I use a footrest at a standing desk?
A flat footrest isn’t the typical solution for standing. Most people instead use an anti-fatigue mat or a small rocking rail that lets one foot rest slightly higher at a time, which encourages shifting weight rather than standing locked in one position for long stretches.
What size footrest should I get?
Wide enough to fit both feet without crowding, which usually means checking the width listed against your own shoe size and stance rather than assuming one size fits everyone. Height-adjustable models are worth the small price difference if more than one person shares the desk.
Is a rocking or tilting footrest better than a flat one?
Neither is universally better. Some users prefer a tilting or rocking design because it lets them shift foot position periodically instead of staying static. Others find a flat, stable platform more comfortable for long stretches of focused work. It comes down to personal preference more than a clear right answer.
From the Relief for Body desk
Every guide here is built from the manufacturer’s own documentation, published safety guidance, and the pattern in what owners report over months of use, not from a lab or a clinic. Nothing is sponsored, and verdicts are settled before any affiliate link goes in. We are not clinicians, and nothing on this site replaces one. How we review explains the process.
This article is general information, not medical advice. If pain is sharp, persistent, or getting worse, see a clinician.
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