Use the calculated heights as starting ranges
The calculator uses stature-based relationships to estimate chair, keyboard/work-surface, and monitor-top ranges for seated and standing work. These are not prescribed medical dimensions. Body proportions, footwear, chair design, keyboard thickness, task type, screen size, vision needs, and available adjustment can all change the practical setting.
Fit the workstation to neutral posture
Adjust the keyboard and mouse so the shoulders stay relaxed, elbows remain close to the body, forearms and wrists are approximately straight, and elbows are near keyboard height. While seated, support the feet on the floor or a footrest and keep adequate thigh and leg clearance. A keyboard tray or chair adjustment may be needed when a fixed desk cannot reach the target posture.
Check the monitor separately
Place the monitor directly in front of the user. The top of the screen is generally at or slightly below eye level, with a comfortable downward viewing angle. Monitor distance, text size, bifocals, multiple displays, and laptop use can require a lower or otherwise different position, so confirm that the head and neck remain balanced rather than relying only on the calculated monitor range.