Optimal desk height

Adjust desk height correctly: How to calculate the ideal desk height for your body size

Anyone who sits at a desk for 8 hours and feels their neck, shoulders or back in the evening usually looks for the cause in the chair or themselves. Often, it comes down to the desk height: Just 3 to 4 centimetres too high or too low forces your shoulders and spine into an awkward posture all day long.

The good news: The ideal desk height can be calculated and adjusted in just a few minutes. You’ll find the formula, the guideline table and the 90-degree check here.

Why the right desk height matters for your health

The desk determines where your arms work. If that position is wrong, your body compensates, usually through muscle tension. You’ll typically notice it like this:

• Desk too high: You unconsciously pull your shoulders upwards. The result is tension in the shoulder area, neck pain and often headaches too. Your wrists bend awkwardly.

• Desk too low: You lean your upper body forwards and your back rounds. This puts strain on the lumbar spine and intervertebral discs and leads to lower back pain.

• Chair too high (or desk adjusted to match): The front edge of the seat presses into your thighs. This can lead to numb legs, cold feet and a heavy feeling in the legs.

• Chair too low: Your knees are higher than your hips, your pelvis tilts backwards, and you slump in on yourself.

These complaints do not develop in a single day, but gradually. Muscles and joints are put under one-sided strain over weeks and months until a slight ache turns into a constant problem. That is why desk height is one of the easiest adjustments you can make to prevent poor posture.

Calculate desk height: Formula and guideline table

There is a practical guideline for desk height when sitting:

Desk height (sitting) in cm ≈ body height in cm ÷ 2.48

For example: At a height of 180 cm, the calculation is 180 ÷ 2.48 ≈ 72.5 cm.

The right seat height, meaning the distance between the floor and the seat surface, can be roughly estimated like this:

Seat height in cm ≈ body height in cm × 0.25

For working while standing, the desktop should be at about elbow height. A useful guideline is body height × 0.63. For 180 cm, that is around 113 cm.

Guideline table: Body height, seat height and desk height

Important: These are guideline values with a tolerance of around ±2 cm. Arm and leg lengths vary from person to person, and shoes or keyboard height also affect the result. So always check the calculated value using the 90-degree check further down.

Why 72 cm is not right for many people

Standard desks are usually around 72 cm high. This height suits people around 175 to 180 cm best. If you are significantly shorter or taller, you have to compensate with the chair: shorter people often need a footrest because the chair has to be raised. Taller people sit with their knees under the desk top or work with their shoulders hunched up.

The 90-degree check: How to adjust your desk and chair in 5 steps

The order is crucial: first the chair, then the desk, and finally the screen.

1. Adjust seat height: Sit so that your feet are flat on the floor. Your thighs and lower legs should form an angle of around 90 to 100 degrees, with your thighs horizontal or slightly sloping downwards. Leave a gap of two to three fingers between the front edge of the seat and the back of your knees.

2. Lean back: Your pelvis should be positioned right at the back of the seat, with your back resting against the backrest. The lumbar support should support the natural curve of your lower back.

3. Relax your arms: Let your upper arms hang loosely and bend your forearms. Your elbows should be at an angle of around 90 to 100 degrees.

4. Adjust the desktop: The desktop (or keyboard) should be level with your forearms. Keep your shoulders relaxed and your wrists straight.

5. Check legroom: There should be at least 2 to 3 cm of clearance between your thighs and the underside of the desk. The distance between the seat surface and the desktop is usually 27 to 30 cm.

Quick test: If your shoulders lift upwards, the desk is too high. If you have to lean forward, it is too low.

If your desk is not height-adjustable, only the chair can compensate: adjust it so that your arms rest on the desktop at a 90-degree angle, and use a footrest if your feet no longer rest flat on the floor. This is only a stopgap, as the chair then has to perform two functions at once.

A good match: A chair with infinitely adjustable seat height, seat depth and armrests is what really makes this check possible. Our ergonomic office chairs can be adjusted to suit your body measurements.

Office chair, desk height and screen: how they work together

These three elements depend on each other. If you change one, you need to check the others.

• Armrests: They should slide under the desktop or finish level with the desk so that you can sit close enough to it.

• Screen height: The top edge of the monitor should be at eye level or slightly below. This lets your gaze fall slightly downward and keeps your neck relaxed.

• Screen distance: Around 50 to 70 cm, roughly an arm's length. For laptops, a stand with an external keyboard helps.

• Keyboard and mouse: On the same level and close to your body, so that your elbows do not move outwards.

• Storage space: Anyone using filing cabinets, monitor risers or drawer pedestals should also consider legroom. You’ll find practical solutions under Storage & Accessories.

Sit-stand dynamics: why a fixed desk is rarely enough

Even the perfectly adjusted sitting posture puts strain on the body if it remains unchanged for hours. Health experts therefore recommend varying your day: a common recommendation is to spend at least two hours of the working day standing or walking, and up to four in the long term. In practice, changing position every 30 to 60 minutes has proven effective.

That’s hardly possible with a fixed desk. Then there’s the issue of different users: if two people share one workspace in a home office or several colleagues work in a desk-sharing setup, a fixed height will only suit one of them.

The benefits of an electrically height-adjustable desk

• One desk for everyone: Each person sets their own height.

• Memory settings: At the touch of a button, the desk moves to the saved sitting or standing height.

• More movement: You change posture without leaving your workstation.

• Fine adjustment: You can adjust the height precisely to the centimetre, for example when changing shoes or swapping chairs.

Our tip: Discover our height-adjustable desks in various sizes and designs. You’ll find the full range for your workspace in the Office Furniture category.

The right desk height in three minutes

Divide your height by 2.48, adjust your chair first, then use the 90-degree check to see whether your forearms rest comfortably. If that doesn’t work, it’s rarely down to you, but usually to a desk or chair that can’t be adjusted to fit.

With a height-adjustable desk and an ergonomic office chair from hjh OFFICE, both can be tailored precisely to you, whether sitting or standing.