How to measure the depth of a desk for a monitor and keyboard

When choosing a desk, width is often the first dimension we notice. But when working with a monitor, depth is equally important: it must provide enough space for your screen, keyboard, and mouse while keeping the screen at a comfortable viewing distance.

Before buying, therefore, don't just measure the space between the wall and the edge of the room. Temporarily place your actual equipment on the desk and check whether you can use it without leaning forward or reaching for the mouse.

Desk depth is not the same as viewing distance

Depth is the measurement of the desktop from the front edge to the back edge. Viewing distance, however, is measured from your eyes to the screen. The monitor stand may take up some of the depth, while you need the rest for your keyboard and mouse. Therefore, two desks of the same depth may offer different amounts of usable surface area in practice, depending on the stand, base, and arrangement.

OSHA recommends in its workplace surface guide that the depth should allow the monitor to be placed at least approximately 50 cm from the eyes and directly in front of the user. CCOHS cites a wider guideline range of 40–74 cm and notes that recommendations vary and are not a rigid rule for everyone. If the screen is difficult to read at a comfortable distance, increase the text size rather than bringing it closer by leaning forward. OSHA: workplace surfaces and monitor space; CCOHS: monitor position and distance.

Test the arrangement before choosing a desk

1. Place the chair in its usual position. Sit as you do every day and choose a screen position that allows you to view it without leaning your torso forward.
2. Measure the distance from your eyes to the screen. Write it down along with the height of the stand or the depth of its base. This is your practical baseline measurement, not a universal standard for everyone.
3. Place the keyboard and mouse. Use them in a position that keeps your shoulders relaxed and does not require you to reach far out. Frequently used items should remain within comfortable reach.
4. Measure the occupied part of the desktop. From the front edge to the back edge, write down how much space the keyboard, monitor stand, and other essential items take up. Check whether the equipment still fits directly in front of you.
5. Check the legroom. If the desk has a drawer, crossbar, or support, check the area underneath as well. A deep desktop is of no use if the construction prevents you from getting close to the work surface.

What if the desk is too shallow?

First check whether the monitor stand unnecessarily takes up a lot of space. A compatible monitor mount may free up part of the desktop, but check the mounting method, the thickness of the desk edge, and the mount's weight capacity. The mount must not obstruct the screen position or cause instability.

If the problem is that the keyboard or mouse does not have enough space, do not try to solve it by pushing them to the side. OSHA warns that a workspace that is too small or poorly arranged can cause you to reach for the pointing device. Sometimes a deeper desk is more suitable; in a small space, a different equipment arrangement or a corner work surface may help.

What to write down before ordering

• the available depth of the space, measured from the wall to the edge where you will sit;
• the depth of the monitor stand and the distance at which the screen is comfortable for you;
• the space taken up by the keyboard and mouse in your usual position;
• any crossbars, drawers, or wall obstructions;
• the width of the desk and space for accessories you use every day.

When comparing Ergosed electric desks, check the specified dimensions of the particular model and compare them with the arrangement of your equipment. Available depths vary between desks; therefore, assess suitability based on your monitor, keyboard, mouse, and the space in your room.