Your feet dangle, or they rest on the floor but your thighs feel the seat edge, and you cannot tell whether you need a footrest, a lower chair, or neither.
Picked on published fit specifications, not on hands-on testing. How we pick.
The short answer
You need one if your chair cannot drop low enough for your feet to be flat on the floor, or if your desk is too tall and you had to raise the chair to reach it. You do not need one if your chair does reach the floor - in that case a footrest adds a problem rather than solving one.
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Ranked picks with published seat height, seat depth and weight capacity
#
Product
Best for
Seat height
Capacity
Price
1
Steelcase Series 1
Seat height 16.5-21.5 in, 400 lb, 12-year warranty
#ad Seat height and capacity are the manufacturer's published figures, sourced under each pick. We do not publish prices — each button opens the current price on the retailer's own page. Seat depth for every pick is in the spec block below. Seat depth summary: Steelcase Series 1 15.5"–17.75" · Herman Miller Aeron 16"–18.5" · Sihoo Doro C300 18.11"
The test, in thirty seconds
Sit in your chair at your desk, set to the height you actually use. Now check three things in this order:
Are your forearms level with the work surface? If not, the desk height is the live problem and you should read what to do if your desk is too high before anything else.
Are both feet flat on the floor, carrying some weight? Not toes touching - flat, with your weight going through them.
Is the front edge of the seat clear of the back of your knees? Two fingers of gap is about right.
If (1) is right and (2) is wrong, you need a footrest. If (1) is wrong, fix the desk and the chair first, because raising the chair to meet a high desk is itself the commonest reason people end up needing a footrest. If (2) is right already, you do not need one - skip to the last section of this page, because adding one will make things worse.
Why unsupported feet matter more than they sound like they should
Your legs are heavy. When your feet are not carrying their own weight, that weight hangs off the front edge of the seat and does two things: it compresses the soft tissue and blood vessels on the underside of your thighs, and it rotates your pelvis backward as the hamstrings pull.
A backward-rotated pelvis flattens the lumbar curve. That is the mechanism behind a large share of desk-related lower back ache, and it is why we lead with feet rather than lumbar support on nearly every page on this site. It is also why a chair with an excellent lumbar system can feel like it changed nothing: the support is pushing against a pelvis that has already given up.
Who is likely to need a footrest, and why
Situation
Why
Footrest needed?
Under about 5 ft 4 in with a standard chair
The industry-standard minimum seat height is 17 in, which is above a quarter of your standing height
Yes, unless the chair drops below 17 in
Any height, at a fixed 29-30 inch desk
You raised the chair to get your arms level, which lifted your feet off the floor
Yes - it is the second half of that fix
Tall sitter at a standard desk
The seat is likely already too low rather than too high
No - a footrest would raise your knees above your hips
Feet already flat with weight through them
Nothing is wrong
No
The 17-inch figure is the one worth remembering: it is the conventional floor for office task chairs, and it is too high for most adults under roughly 5 ft 8 in once you work through the arithmetic in seat height for your height. That is not a fringe case - it is most of the population.
What to look for if you buy one
A platform wide enough for both feet side by side. A narrow bar makes you keep your feet together, which is one fixed position rather than several.
Height you can set, not a single fixed height. The right height is whatever makes your thighs level with your knees at the hip, and that depends on your chair, not on the product.
A surface that does not slide. A footrest that skates away under pressure trains you to brace instead of rest.
Enough solidity to take real weight. That is the whole function. A soft cushion under your feet does not replace the floor.
When a footrest is the wrong answer
Three cases where adding one makes things worse.
Your feet already reach the floor. Raising them lifts your knees above your hip joints, which rotates the pelvis backward - the exact problem a footrest is supposed to prevent. If your feet are flat and loaded, leave them there.
The real problem is seat depth. Pressure behind the knees and a sense that you cannot get comfortable is often a pan that is too long rather than a seat that is too high, and a footrest does nothing for it. The seat depth guide distinguishes the two, and chairs with adjustable seat depth lists the chairs that address it.
You are using it to avoid buying a chair that fits. A footrest compensates for a seat that will not go low enough. That is a legitimate compensation and it works - but if you are also fighting the pan length, the armrest height and the backrest position, the chair is simply the wrong size and no accessory fixes four things at once. Best office chairs for short people and short sitters with back pain cover the chairs built for that case.
A note on chairs sold "with a footrest"
A number of budget listings advertise a built-in retractable footrest. It is a recliner feature rather than a working-posture one: the footrest extends forward when you lean back, which supports your legs while reclined and is unreachable while you are typing. If you want foot support at the desk, that is a separate flat platform on the floor, not a telescopic leg rest attached to the seat. We have not ranked any chair on this page for having one, because the two features solve different problems.
The picks in full
1. Best for A seat that drops to 16.5 inches
Steelcase Series 1
The cheapest chair in our registry that goes low enough to make a footrest unnecessary for most people under 5 ft 8 in. Steelcase publishes a 16.5-inch minimum seat height against an industry-standard floor of 17 inches, which sounds like a trivial half-inch and is the difference between flat feet and dangling ones for a meaningful slice of adults. It also publishes 15.5 to 17.75 inches of functional seat depth, a 400-pound rating and a 12-year multi-shift warranty. Adjustable lumbar is configured rather than standard.
Who it fits
Anyone between about 5 ft 2 in and 6 ft who would rather solve this with the chair than with an accessory.
Who it does not fit
Anyone under about 5 ft 2 in - 16.5 inches still will not reach the floor - and anyone needing lumbar as standard.
Published specifications
Seat height
16.5"–21.5"
Seat depth
15.5"–17.75"
Weight capacity
400 lb
Lumbar
Optional adjustable lumbar; weight-activated tension as standard
2. Best for A size A shell that drops to 14.4 inches
Herman Miller Aeron
The lowest published seat height on this site, and the reason it belongs on a footrest page: at 14.4 inches the size A Aeron reaches the floor for sitters that no standard chair accommodates, which removes the need for a footrest entirely rather than working around it. Herman Miller publishes size A with a 16-inch pan warrantied to 300 pounds, B at 14.8 to 22.8 inches with a 17-inch pan to 350 pounds, and C at 15.8 to 22.8 inches with an 18.5-inch pan to 400 pounds, all behind a 12-year three-shift warranty. The whole argument collapses if you order the wrong shell, so read the size chart before you buy.
Who it fits
Shorter sitters who want flat feet without an accessory, and anyone who needs the lowest published seat on the market.
Who it does not fit
Anyone who orders by price rather than by size chart, and anyone who dislikes an unpadded mesh seat.
Published specifications
Seat height
14.4"–22.8"
Seat depth
16"–18.5"
Weight capacity
400 lb
Lumbar
PostureFit SL or adjustable lumbar pad, both height-adjustable
Sizes
A (seat height 14.4-19.3 in, seat depth 16 in, warrantied to 300 lb), B (14.8-22.8 in, 17 in, 350 lb), C (15.8-22.8 in, 18.5 in, 400 lb)
3. Best for The budget case where a footrest is likely
Sihoo Doro C300
On this page as the honest cautionary pick. Sihoo publishes a great deal about the Doro C300 - an 18.11-inch pan with depth adjustment, a backrest that moves through 18.11 to 21.65 inches, a 20.28-inch seat width, a 330-pound rating, a three-year warranty - and does not publish a seat height from the floor, only an overall chair height of 42 to 49 inches. For most budget chairs that is the norm, and the practical consequence is that if you are short you should plan to buy a footrest alongside the chair, because you cannot confirm from the spec sheet whether your feet will reach.
Who it fits
Anyone on a budget who accepts a footrest as part of the purchase rather than a failure of it.
Who it does not fit
Anyone who needs a confirmed seat height before ordering, and anyone over 330 lb.
Only in two situations: your chair cannot drop low enough for your feet to sit flat on the floor, or your desk is tall enough that you had to raise the chair to get your forearms level. If your feet are already flat and carrying weight, a footrest will raise your knees above your hips and make things worse.
How high should a footrest be?+
High enough that your thighs are roughly level - knees at about the same height as your hip joints - with your feet flat and taking real weight. That height depends on how high your chair ended up, which is why adjustable is worth paying for and a single fixed height often is not.
What can I use instead of a footrest?+
A ream of printer paper, a weighted shoebox, a stack of hardbacks or an upturned crate. Solidity is the only requirement - it has to replace the floor. Use one of these for a day or two first: if your back feels different by late afternoon, buy a proper one; if it does not, your feet were not the problem.
Is a footrest better than a lower chair?+
A lower chair is better, because it solves the cause instead of compensating for it - and it keeps your knees and hips in the right relationship without an extra object on the floor. The Steelcase Series 1 publishes a 16.5-inch minimum and the size A Herman Miller Aeron 14.4 inches, which is the lowest published figure in our registry.
Do footrests help with sciatica or leg numbness?+
They remove one contributor: pressure on the underside of the thigh from legs that hang off the seat edge. That is worth having. But leg numbness and referred pain have causes a chair accessory does not address, and anything involving numbness in the foot, weakness or a foot that catches should be assessed rather than shopped for.
