How Deep Should a Desk Be? Dimensions for Monitor and Laptop (60 cm vs 80 cm)
The optimal depth of a desk is primarily determined by the equipment you use: 60 cm is sufficient for working purely on a laptop, whereas an ergonomic workstation with one or more external monitors requires a depth of at least 80 cm.
Choosing the correct desktop is the decisive factor for healthy posture when setting up a workstation. A desk is like a workbench for office work – the space must be tailored precisely to the tools you use. If the desktop is too shallow, the screen sits too close to your eyes; if it is too deep, you waste valuable floor space. This guide explains the technical and ergonomic dimensions for desktops, how to maximise space through smart cable management, and what to keep in mind when assembling a desk yourself.
Types of Desks by Depth
The depth of a desk determines the distance between the front edge (where you sit) and the rear edge (where the monitor usually sits). Standard measurements have become established in furniture construction, selected according to intended use.
The Narrow Desk (Depth 40 cm to 60 cm)
Desktops with a depth of 40 cm to 60 cm fall into the narrow category. They are ideal for small rooms, hallways, or an occasional workstation in the bedroom. A depth of 60 cm provides just enough space for a laptop, a notepad, and a cup of coffee. However, for continuous work with a large external monitor on a stand, this measurement is unsuitable because the viewing distance is too short. For desks & computer desks intended purely for writing or tablet use, this depth is entirely sufficient.
The Standard Desk (Depth 70 cm to 80 cm)
An 80 cm depth is the standard norm for professional office workstations. This dimension allows you to place a keyboard, mouse, and a 24-inch to 27-inch monitor in line without your wrists hanging over the desk edge. At an 80 cm depth, a viewing distance of 60 cm to 70 cm to the screen is achieved. This relieves eye strain and prevents neck tension. Anyone working eight hours a day in a home office should consider this dimension the absolute minimum.
The Deep Desk (Depth 90 cm to 100 cm)
Desktops from 90 cm depth upwards are specialist solutions. They are used when exceptionally large monitors (from 32 inches) or multiple screens side by side are required. This depth is also practical for architects, designers, or anyone handling large-format paper documents alongside digital work. The disadvantage lies in the significant floor space required in the room.
How to Choose the Right Desk Depth (Criteria)
When planning a DIY desk build, you should not determine the depth by guesswork, but on the basis of specific technical and ergonomic criteria.
1. Hardware and the Monitor Stand
Measure the depth of your monitor stand. Modern screens often have bulky feet extending up to 25 cm onto the desktop. If you use a 60 cm deep top, only 35 cm remains for your keyboard and forearm support once the stand is accounted for. This forces you into an unhealthy posture.
2. Ergonomics and Viewing Distance
Workplace ergonomics require that your forearms rest comfortably on the desktop. For this, you need around 15 cm to 20 cm of space in front of the keyboard. At the same time, the monitor should be at least an arm's length (approx. 60 cm to 80 cm) away from your eyes. This geometry can physically only be achieved with a desktop of at least 70 cm, preferably 80 cm depth. A height-adjustable desk supports ergonomics further by alternating between sitting and standing, but does not change the base depth required for peripherals.
3. Room Planning and Combining with Other Furniture
In narrow study rooms, desks often need to align with other pieces of furniture. If you need storage next to the desk, combining furniture with similar depth measurements is practical. Beside a 60 cm deep desk, a chest of drawers depth 35 cm or a chest of drawers depth 30 cm can serve as space-saving storage for files and office supplies without blocking walkways.
Save Space and Gain Depth: Cable Management
A common issue with desks – regardless of depth – is the loss of space caused by cables. Power cords, HDMI leads, and USB cables hanging off the back force the desk several centimetres away from the wall. Cable bundles on top of the desk also clutter valuable working area.
The solution for the ambitious DIYer is drilling a hole for a cable grommet. This allows cables to be routed directly down through the desktop. The desk can sit flush against the wall, and the full usable depth of the board is preserved.
Choosing the Right Cable Grommet
The size of the grommet depends on the number and thickness of the plugs. A standard mains plug requires a diameter of at least 40 mm.
- For a single monitor and a charging lead, a desk cable grommet 60mm is often sufficient.
- For complex setups with multiple monitors, thick power cables, and network connectors, you should choose a desk cable grommet 80mm. In general, in our range of cable grommet for desk fittings, you will find various materials such as plastic, aluminium, or zinc alloy.
Alternative: The Monitor Arm
If the room cannot accommodate an 80 cm deep top and you are limited to 60 cm, a monitor arm with a desk clamp is the technical answer. The arm clamps to the rear edge or bolts through a drilled hole. The bulky monitor stand is eliminated entirely. This recovers around 20 cm of usable depth on a 60 cm top. Make sure to check the load capacity of the arm and the stability of the desktop.
Special Cases: Children's Rooms and Specific Materials
When planning for children, different dimensions apply. A children's desk often starts at a depth of 50 cm to 60 cm. For homework and crafts during the early school years, this is ample. Because children have shorter arms, an 80 cm top would be too deep for reaching items placed at the back edge.
For materials, you can choose between coated engineered wood and solid timber. A chipboard panel with a melamine resin coating is scratch-resistant, liquid-repellent, and ideal for heavy use. A wooden desk (solid timber) brings a natural feel to the room, but requires regular maintenance with oil or wax to protect the surface against ink or coffee stains.
Assembly Guide: Attaching a Desktop to a Desk Frame
Many DIY enthusiasts nowadays build their own workstations rather than buying ready-made desks. Combining a separate desk frame with a custom-cut desktop from a timber merchant allows you to tailor the depth to the exact millimetre for your room.
Required Tools
- Cordless screwdriver with suitable bits (PZ or TX)
- Tape measure and pencil
- Wood drill bit (Ø 2 mm or 3 mm) for pre-drilling
- Hole saw (if installing a cable grommet)
Step-by-Step Assembly
- Positioning: Place the desktop face down on a soft surface (such as a rug or blanket) to prevent scratches to the decor finish.
- Aligning the frame: Centre the frame on the underside of the panel. Pay attention to the overhangs. If attaching a 60 cm deep frame to an 80 cm deep top, leave a 10 cm overhang at both the front and rear. This prevents the desk from tipping forward when you lean on the front edge.
- Marking and pre-drilling: Mark the fixing holes through the mounting plates of the frame. Pre-drill the holes approximately 2 mm to 3 mm deep. Pre-drilling prevents the chipboard or solid wood from splitting when the screws are driven in.
- Securing with screws: Use pan head screws (round head) or dedicated chipboard screws. Pay close attention to screw length. For a 25 mm thick desktop, screws must be no longer than 20 mm, otherwise they will penetrate the working surface.
- Drilling the cable grommet (optional): Do not flip the top over yet. Measure the desired position for the cable outlet (usually in one of the rear corners, approx. 8 cm to 10 cm from the edges). Position the hole saw and drill at moderate speed. Tip for clean edges: Drill only until the pilot bit breaks through the other side. Then turn the panel over and finish the cut from the top side. This prevents the melamine from tearing out.
Frequently Asked Questions (FAQ)
Is a 60 cm depth enough for 2 monitors?
For two monitors on their standard stands, a 60 cm depth is not recommended. The workspace becomes too cramped, and the viewing distance causes excessive eye strain. If you are restricted to a 60 cm depth, you must use a dual monitor arm with a desk clamp to remove the stands from the desktop.
How far away should the monitor be from your eyes?
The ergonomically recommended viewing distance is between 50 cm and 80 cm, depending on screen size. For a 24-inch monitor, 60 cm is often sufficient. For screens of 27 inches and above, it should be at least 70 cm to 80 cm so that you can view the entire display without constantly turning your head.
Which screws should I use for the desktop?
Use wood screws with a diameter of 4 mm to 5 mm. A TX drive (Torx) offers the best torque transfer without slipping. Calculate the screw length by adding the thickness of the frame mounting bracket to roughly 75% of the desktop thickness.
How do I drill a hole for a cable grommet?
You need a hole saw (hole cutter) attached to a drill. The diameter of the hole saw must match the installation dimension of the cable grommet exactly (e.g. 60 mm or 80 mm). Drill slowly and without excessive pressure to avoid chipping the coating.
Can I cut down an oversized desktop myself?
Yes, chipboard can be trimmed in depth using a guide rail and a circular saw. Keep in mind that the cut edge will be exposed and unprotected. You must apply new edging tape (iron-on edging) using an iron to seal the board against moisture ingress.
Is an under-desk cable tray worth having?
Absolutely. A cable grommet only routes cables through the desktop. To keep them hidden as they run towards the wall socket, a metal or plastic cable tray screwed directly to the underside of the desk is ideal. Extension leads and power bricks can also be housed inside.
Related Hardware Categories & Cabinetry Guides
When planning or modifying your workspace, adjacent furniture often plays a role. Coordinating dimensions properly creates a balanced room layout and maximum functionality.
If you are integrating a desk into a bedroom or hallway and require matching storage that is no deeper than the desk itself, explore space-saving layout solutions. For office supplies to be stored alongside a standard desk, a chest of drawers depth 45 cm is well suited. It offers ample volume for lever arch files without overwhelming the room. If you need fittings, hinges, or drawer runners to build your own under-desk pedestal units, you will find all the right technical components in our shop for your next DIY project.