Key principles
- Use 50–100 cm as a starting range, not a rigid rule.
- Frequently read text must remain clear with the back supported.
- A large screen should not require wide head movements.
- System scaling may be better than moving the display closer.
Treat the workstation as a system
An ergonomic workstation is not a single correct height for everyone. The goal is a neutral, unforced position and regular variation. A useful adjustment order starts with the user, chair and keyboard, then moves to the display and accessories.
UstawTo calculator values are starting points. A direct measurement of elbow or eye height is more useful than an estimate based only on stature. Evaluate every adjustment during a real task, not only during a brief sitting test.
Adjustment order
- Adjust the chair and stable back support.
- Match keyboard height to relaxed shoulders and elbows.
- Support the feet without pressure under the thighs.
- Place the display at a readable distance and suitable height.
- Check the mouse, lighting, glare and frequent items.
Practical example
When a fixed desk is too high, the user may raise the chair so the keyboard approaches elbow height. This can create a new problem: unsupported feet. The next step is a stable footrest or a different work surface, not leaving the legs hanging.
What to avoid
Do not change one parameter without checking its effect on the rest of the setup. Raising the display, desk or chair changes the position of hands, feet and eyes. Identify the actual constraint before buying accessories; stable foot support, larger text scaling or moving the screen can be more effective than another gadget.
Next step
Sources and methodology
The guidance uses OSHA and HSE materials on monitors, chairs, keyboards, posture and workstation assessment. Calculators intentionally provide ranges and starting points because official guidance emphasises that one setup does not fit everyone.