Office Chair Too High Even at Its Lowest? Options for Shorter Users

Quick Answer: If your feet don't reach the floor at the lowest setting, add a footrest. To lower the seat itself, fit a shorter gas cylinder or choose a lower chair.

• You need a fix today, or your desk height suits you: Use Fix A to add a footrest
• You want the seat itself lower: Use Fix B to fit a shorter cylinder
• You're not sure how much lower you need: Measure in Step 1

• Time: About 10 minutes to measure; longer to fit a new cylinder (planning estimate).
• Difficulty: Easy for a footrest; moderate for a cylinder swap.
• Tools: A tape measure and a helper to read it.

Jump to:

• Step 1 - Measure Your Knee Height and the Chair's Lowest Seat
• Step 2 - Support Your Feet or Lower the Seat
• Step 3 - Sit and Work at the Desk
• Common Mistakes
• FAQ

Why an Office Chair Is Too High for Shorter Users

An office chair that's too high even at its lowest setting leaves your feet dangling or just touching the floor on tiptoe. The seat's lowest height is set by the gas cylinder's compressed length and the thickness of the base and seat, so many standard chairs can't go lower than a certain point.

When the seat is higher than the back of your knee, the front edge presses into the back of your thighs. You end up perching forward or tucking your feet on the base.

You can bring your feet up to the seat with a footrest, or bring the seat down with a shorter cylinder or a different chair. Which one fits depends on how big the gap is and on your desk height.

Problem state: The seat's lowest setting is above the back of your knee, so your feet don't rest flat and the seat edge presses your thighs.

Corrected state: Your feet rest flat on the floor or a footrest, your thighs are roughly level, and the seat edge doesn't press behind your knees.

Step 1 - Measure Your Knee Height and the Chair's Lowest Seat

Measure in the shoes you usually wear at your desk.

1. Measure your knee height: sit on a firm surface with your feet flat and thighs level. Have someone measure from the floor to the back of your knee.
2. Lower the chair fully: set the seat to its lowest position.
3. Measure the seat: measure from the floor to the top of the seat at its front edge.
4. Find the gap: subtract your knee height from the seat height.
5. Check your desk: note whether the desk is already comfortable at your current seat height, or too high.

What the result means:

• There's a gap, and the desk suits you at this seat height: a footrest is the right fix. Use Fix A.
• There's a gap, and the desk is too high for you too: lowering the seat would make the desk feel even higher, so use Fix A and keep the seat where it is.
• You want a lower seat and the desk can come down with it, or you use a keyboard tray: use Fix B.
• A shorter cylinder can't close the gap: use Fix C.

Step 2 - Support Your Feet or Lower the Seat

Start with a footrest. It needs no tools and keeps the chair matched to your desk.

Fix A - Add a Footrest

Use when: you need a quick fix, or the desk suits you at the current seat height.

Before you start: keep the chair at the height that suits the desk, and bring the floor up to your feet rather than lowering the seat.

1. Find the footrest height: use the gap from Step 1 as a starting height.
2. Choose an adjustable footrest: an adjustable height and tilt let you fine-tune it.
3. Place it: set it where your feet naturally rest, so your thighs stay roughly level.
4. Check the seat edge: make sure the seat edge no longer presses behind your knees.

A seat that's too deep for you also presses behind the knees; How to Adjust Office Chair Seat Depth shows how to check it.

Check: sit and work for a while. If your feet rest flat and your thighs are supported, go to Step 3.

Fix B - Fit a Shorter Gas Cylinder

Use when: you want the seat itself lower, and your desk or keyboard tray can come down to match.

Before you start: measure the old cylinder's body diameter and its visible length at the lowest setting, so you can compare it with replacements.

1. Work out the drop you need: use the gap from Step 1.
2. Choose the cylinder: pick one with the same body diameter whose compressed length is shorter than the old one by at least that gap.
3. Check the top setting: a shorter cylinder often has a shorter stroke, so make sure it still reaches the heights you use.
4. Swap it: remove the old cylinder and fit the new one as its instructions describe, then sit down firmly to seat it.

If the desk is now too high for your hands, a keyboard tray can bring the keys down; see How High Should a Keyboard Tray Be?.

Check: lower the seat fully. If your feet rest flat, go to Step 3. If it's still too high, go to Fix C.

Fix C - Choose a Chair With a Lower Range

Use when: a shorter cylinder can't bring the seat low enough.

Before you start: have your knee height from Step 1 ready to compare with chair listings.

1. Read the seat height range: look for chairs whose listed minimum seat height is at or below your knee height.
2. Check the seat depth: a shallower seat suits shorter legs and lets you sit back fully.
3. Check the armrests: make sure they go low enough, or can be removed, so they don't push your shoulders up.

Check: once you have the chair, set it as in Fix A or Fix B, then go to Step 3.

Step 3 - Sit and Work at the Desk

Sit at your desk and work through a normal session.

PASS: Your feet rest flat on the floor or footrest, your thighs are roughly level, the seat edge doesn't press behind your knees, and your forearms are roughly level with the keyboard.

FAIL: Your feet still dangle, you perch on the front edge, the seat presses behind your knees, or the keyboard is now too high.

NEXT ACTION:

• Your feet still dangle: raise the footrest with Fix A.
• You want a lower seat: fit a shorter cylinder with Fix B.
• The keyboard is too high after lowering the seat: add a keyboard tray, as in Fix B.
• Nothing gets low enough: choose a chair with a lower range with Fix C.

Common Mistakes

Mistake: Lowering the seat when the desk is already too high for you.

What happens: your feet reach the floor, but the keyboard ends up higher than your elbows.

Instead: keep the seat matched to the desk and use a footrest.

Mistake: Using a stack of books as a footrest.

What happens: it slides, tips, and can't be adjusted.

Instead: use a stable footrest with a non-slip base.

FAQ

What if my office chair is too tall for me?

Add a footrest first. If you want the seat itself lower, fit a shorter cylinder or choose a chair with a lower minimum height.

Can I cut down an office chair cylinder?

No. The cylinder holds pressurized gas and must never be cut. Replace it with a shorter one.

What seat height do I need?

Start near your knee height, measured from the floor to the back of your knee with your feet flat.

This guide covers adjustable office chairs with a gas cylinder. The knee-height starting point is a practical guide, not a medical prescription.

Written and edited by Lio Lim

Every guide on The ErgoDesk Lab is reviewed before it goes live so each step leads to a clear next action. Spotted something unclear or wrong? Let us know, or read how these guides are made.