Workstation Ergonomics: How to Set Up and Assess a Computer Workstation

What is workstation ergonomics?

Workstation ergonomics is the practice of arranging a computer workstation so it fits the person using it. The goal is a neutral working posture, a screen that is easy to see, input devices within easy reach, and enough adjustability that the user can change position through the day.

OSHA's Computer Workstations eTool makes an important point up front: there is no single "correct" posture or arrangement of components that fits everyone. What exists are design goals. Treat every number in this guide as a starting point you tune to the person in the chair.

If you want a structured way to check a desk as you read, open the free workstation self-assessment in another tab and work through it section by section.

What does a neutral posture at a computer look like?

OSHA describes neutral body positioning as a comfortable posture in which the joints are naturally aligned. Its checklist for a computer user:

• Hands, wrists and forearms straight, in line and roughly parallel to the floor.
• Head level, facing forward, balanced and generally in line with the torso.
• Shoulders relaxed, upper arms hanging normally at the sides.
• Elbows close to the body and bent between 90 and 120 degrees.
• Feet fully supported by the floor, or by a footrest if the desk height is not adjustable.
• Back fully supported, with lumbar support when sitting upright or leaning back slightly.
• Thighs and hips supported and generally parallel to the floor.
• Knees at about the same height as the hips, with the feet slightly forward.

OSHA also defines four reference postures that all count as neutral: upright sitting, standing, declined sitting (thighs sloping down, hip angle over 90 degrees) and reclined sitting (torso reclined 105 to 120 degrees from the thighs). A good workstation supports more than one of them.

The posture side of this is covered in more depth in our guide to good sitting posture.

Which components matter most in computer workstation ergonomics?

In workstation ergonomics, every component interacts with the others. Raise the chair and the desk becomes relatively lower; lower the keyboard and the screen may now be too high. That is why the setup order matters.

Component	Key guideline	Source
Chair	Backrest fits the lower back curve; feet flat on floor or footrest; five-leg base with casters	OSHA eTool, Chairs
Desk	Room to place the monitor at least 20 in (50 cm) away; leg clearance generally 20 to 28 in (50 to 72 cm) high	OSHA eTool, Desks
Keyboard	Directly in front; elbows about keyboard height; wrists straight	OSHA eTool, Keyboards
Mouse	Close to the keyboard, in line with the elbow	OSHA eTool; HSE
Monitor	Top at or slightly below eye level; 20 to 40 in (50 to 100 cm) away; directly in front	OSHA eTool, Monitors

Chair

The chair is the first adjustment because it sets your eye height and elbow height. OSHA recommends a backrest that conforms to the natural curve of the spine with adequate lumbar support, a seat that lets the feet rest flat on the floor or a footrest, and soft armrests that let the shoulders relax.

Desk and leg space

OSHA advises keeping the space under the desk free of CPUs, files and storage so the user can change leg position. Clearance should accommodate at least two of the three seated reference postures, one of which must be upright sitting.

Keyboard and mouse

Place the keyboard directly in front of you so the elbows stay close to the body with forearms roughly parallel to the floor. HSE's standard setup puts the keyboard just below elbow height and the mouse in line with the elbow.

Monitor

OSHA puts the top of the screen at or slightly below eye level, with the center of the screen normally 15 to 20 degrees below horizontal eye level. Our article on monitor ergonomics and screen height walks through the numbers, bifocal adjustments and dual-screen layouts.

In what order should you set up a workstation?

A practical sequence that avoids undoing earlier adjustments:

1. Chair height. Feet flat, thighs roughly horizontal, knees about hip height.
2. Backrest and lumbar support. Fit the curve of the backrest into the small of the back.
3. Work surface or keyboard height. Bring it to elbow height. If the desk is fixed and too high, raise the chair and add a footrest.
4. Keyboard and mouse position. Directly in front, close to the body, mouse beside the keyboard.
5. Monitor distance and height. About an arm's length away, top of screen at or slightly below eye level.
6. Lighting and glare. Screen perpendicular to windows, task light on paper rather than the screen.

The step-by-step version with measurements is in our guide on how to set up an ergonomic desk.

What are the common workstation risk factors?

OSHA's eTool groups computer workstation hazards into a few recurring patterns:

• Awkward postures. A monitor that is too high tilts the head back. A keyboard that is too low bends the wrists. A mouse placed far away pulls the elbow out from the body.
• Contact stress. Hard desk edges, sharp wrist rests or the front edge of a chair seat pressing on forearms or thighs.
• Force. Gripping a mouse tightly, or using a pointing device with sensitivity set so high it is hard to control.
• Prolonged static work. OSHA notes that using a mouse for several uninterrupted hours can expose the small muscles and tendons of the hand to hundreds or thousands of repetitions without adequate recovery time (Work Process and Recognition).

The last item is why workstation ergonomics is about more than setup. OSHA recommends variation in tasks, short micro breaks to stand and stretch, alternating the mouse hand where possible and substituting keyboard shortcuts for mouse work.

How do you assess a computer workstation?

In the UK, the Health and Safety (Display Screen Equipment) Regulations 1992 set a formal requirement. HSE guidance says that if workers use DSE daily, as part of normal work, continuously for an hour or more, employers must do a workstation assessment that looks at:

• the whole workstation, including equipment, furniture and work conditions,
• the job being done, and
• any special requirements of the person, such as a disability.

HSE also lists when a fresh assessment is needed: a new workstation, a new user, a change to the workstation or how it is used, and when users complain of pain or discomfort.

HSE's free DSE workstation checklist (CK1) covers six areas with yes/no boxes: keyboards, mouse and trackball, display screens, software, furniture and work environment. In the US there is no equivalent federal regulation for office workstations, but OSHA's eTool includes an evaluation checklist that follows the same logic.

Where does self-assessment fit?

Self-assessment works well for screening large numbers of desks, including home workstations. HSE is clear about the limit, though: assessment software helps train users and gets them involved, but it is not an assessment on its own. A trained assessor should review the results, clear up doubtful points and make sure problems get fixed.

That is how we designed the ViveLab workstation self-assessment: it flags likely problems for the user and gives the safety lead a record to review, not a final verdict.

What office ergonomics standards apply to computer workstations?

The main US consensus standard is ANSI/HFES 100, Human Factors Engineering of Computer Workstations. According to the Human Factors and Ergonomics Society, the 2007 edition gives specific guidance on the design and installation of computer workstations, including displays, input devices and furniture, for a wide range of users.

HFES now lists ANSI/HFES 100-2007 as no longer maintained as an American National Standard, with a 2026 draft update that adds updated anthropometric data and covers seated, sit/stand and standing work. If you write furniture purchasing specs that cite HFES 100, check which edition is current before you rely on a specific dimension.

In the UK, the DSE Regulations and HSE's guidance (including the INDG36 leaflet) are the main references. In Canada, CCOHS publishes detailed office ergonomics fact sheets, such as its guidance on positioning the monitor, which stresses that guidelines are a starting point to tailor rather than rules "carved in stone".

How does workstation ergonomics apply to laptops and home offices?

Laptops are the hardest case because the screen and keyboard are joined. If the screen is at a good height, the keyboard is too high, and vice versa. HSE's laptop guidance for prolonged use is to use a separate keyboard and mouse so the screen can be raised on a riser, or to use a separate display.

Home and hybrid workers need the same assessment as office staff when they meet the DSE user definition. Our work from home ergonomics guide covers low-cost fixes for kitchen tables and borrowed chairs.

When is a workstation problem a health problem?

Early symptoms such as aching, tingling or stiffness during the workday are a signal to look at the workstation and the work pattern. This article is general information, not medical advice. Anyone with persistent pain, numbness or weakness should see a clinician.

Upper limb symptoms linked to repetitive computer work are covered in our guide to RSI, and screen-related eye symptoms in eye strain remedies. A free 20-20-20 reminder timer can prompt regular eye breaks for you.

Next steps

1. Run the free workstation self-assessment on your own desk, then on one or two desks where people have reported discomfort.
2. Fix the chair, work surface and screen in that order.
3. Build movement into the day. A well-set-up desk still needs breaks and position changes.

Workstation ergonomics is not a one-off job: recheck the setup whenever the person, the equipment or the task changes.

For the industrial side of the same principles, read our guide to ergonomic workstation design.