Desk planning
Will Under-Desk Storage Leave Room for Your Legs and Chair?
Check storage against seated movement, chair travel and cable routes before moving clutter below the desktop.
Example: the clear opening under your desk is 70 cm wide. A 25 cm wide storage unit leaves a 45 cm gap if placed against one side. That subtraction describes empty width at one location. It does not show whether your chair enters, your knees clear the top or your feet can move through the space you use.
Inspect the space from your working position
Sit in the chair at your normal working height. Note where your thighs, knees and feet go while working and when you move closer or stand up. Inspect the desk frame, crossbar and existing drawers. The desktop's outside dimensions do not describe these obstacles.
OSHA recommends keeping under-desk space clear of items that limit leg and foot movement. Use that principle before assigning spare space to storage. A compartment is not spare simply because it looks empty when the chair is pulled away.
Measure a three-dimensional candidate
- Record the unit's outer width, depth and height, including feet, handles or casters.
- Measure the clear opening at its proposed location, around the desk's frame.
- Check any drawer, door or lid in its open position as well as when closed.
- Keep the chair's approach and exit route available, including its base and wheels.
Example: a 35 cm deep unit fits beneath a 50 cm deep desktop, but a front drawer needs another 25 cm to open. If that space is occupied by the chair, the closed-unit depth is not enough information. You must inspect how you will open it and where the chair can move at that time.
Use an empty cardboard box matching the candidate's dimensions as a temporary outline. Place it where the unit would sit and move carefully through ordinary sitting, repositioning and standing. Do not attach or load a mock-up. If it interferes with movement, change the position or reject that location before considering a purchase.
Trace the cable routes
Follow each cable from device to socket. Check where storage would press against a cable, block access or put it in the chair's path. If the desk adjusts in height, inspect the full intended travel under its manufacturer's instructions. Leave the required movement and access space rather than using a static photo as evidence that cables fit.
For storage fixed to the underside, read the desk and storage manufacturers' instructions about attachment, support material and load. A clear floor footprint does not establish that screws or clamps can be installed at that location. Keep unknown support conditions unresolved until the manufacturer confirms them.
Try another location first
Remove unused items, move occasional supplies to an existing shelf, or keep a small box outside the leg and chair routes. Clearing the desktop can be useful without adding anything underneath. Test whether frequently used items remain reachable from the resulting arrangement.
The desktop calculator guide compares rectangles above the desk. It does not inspect the space below it, chair clearance or cable travel. Keep your under-desk measurements as a separate note. A passing desktop result cannot validate this storage decision.
Sources
OSHA: Desks recommends preserving space for leg and foot movement. The storage and drawer measurements here are examples, not clearance standards.
Before you buy
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Under-desk storage
Check closed and open dimensions, leg and chair routes, cables, and manufacturer mounting and load requirements before choosing a location.
More desk layout guidance
Will Your Monitor, Keyboard and Mouse Fit Your Desk?
What Should You Measure Before Buying a Wider Keyboard?
What Should You Check Before Adding a Monitor Arm to a Small Desk?