Adjust your ergonomic chair in 5 steps
A properly adjusted chair prevents back pain and improves your comfort throughout the day. Follow this step-by-step guide.
Setup time: 10-15 minutes
- Seat height → feet flat on the floor
- Seat depth → 3-4 fingers between seat and knees
- Lumbar support → in the curve of your lower back
- Armrests → elbows at 90°, shoulders relaxed
- Backrest → slight recline, adjusted tension
Calculate your personalised settings
Enter your height in Chair Wizard and get the exact adjustment values for your chair and desk.
Seat height
This is the basic adjustment to make first. The correct height ensures good blood circulation and stable support.
How to do it
- Sit at the back of the seat, with your back against the backrest
- Place your feet flat on the floor
- Check that your thighs are horizontal or slightly tilted downward
- The angle at your knees should be about 90° or slightly more
💡 Tip
If your feet don't touch the floor when the desk is at the right height, use a footrest. Never lower the chair so much that your knees are higher than your hips.
Seat depth
This adjustment prevents pressure behind your knees and ensures good thigh support.
How to do it
- Sit at the back of the seat, with your back in contact with the backrest
- Slide your fist between the front edge of the seat and the back of your knees
- You should have 3-4 cm of space (about 3-4 fingers)
- Adjust the seat depth slider if your chair has one
⚠️ Avoid
If the seat is too deep, you'll be tempted to sit forward without using the backrest. If it's too short, your thighs won't be properly supported.
Lumbar support
Lumbar support maintains the natural curve of your spine and prevents lower back pain.
How to do it
- Identify the curve in your lower back (lumbar region)
- Adjust the height of the lumbar support to fit this area
- Adjust the depth (if available) for firm but comfortable support
- You should feel the support without it being uncomfortable
ℹ️ Good to know
The lumbar region is usually just above your belt line. If your chair doesn't have adjustable lumbar support, a lumbar cushion can work as a temporary solution.
Armrests
Properly adjusted armrests relieve your shoulders and trapezius muscles, and allow optimal arm positioning for keyboard work.
How to do it
- Adjust the height so your elbows form a 90° angle
- Your shoulders should stay relaxed, neither raised nor drooping
- Adjust the width so your arms are in line with your shoulders
- If possible, pivot the armrests slightly inward for keyboard use
💡 Important
Armrests should not prevent you from getting close to the desk. If they bump against the desk, lower them or widen them. No armrests is better than badly adjusted armrests.
Backrest (tilt and tension)
Backrest tilt and tension allow dynamic movement and support adapted to your weight.
How to do it
- Set the tilt between 95° and 110° (slightly reclined)
- If your chair has a synchronous mechanism, activate it for fluid movement
- Adjust the tension to your weight (the lighter you are, the less tension)
- You should be able to lean back without forcing
ℹ️ Synchronous mechanism
The synchronous mechanism moves the seat and backrest together. This is the recommended configuration for office work as it maintains good support regardless of your position.
Final check
Once all adjustments are made, verify these points: