Key takeaways
- A 22 inch deep cabinet needs roughly 68 inches of clear depth to be usable, not 22.
- Drawer extension on a full extension slide is very close to the full drawer depth.
- Measure to the nearest thing you cannot move, not to the opposite wall.
- A parked vehicle with a door open consumes about 30 inches beyond its body width.
The measurement people get wrong
Retail listings give you a footprint. A footprint tells you where the cabinet sits, not where you stand, and not where the drawer goes when you open it. The number that decides whether a cabinet is usable is:
For a mainstream 22 inch deep cabinet with full extension slides, that is roughly 22 + 20 + 26 = 68 inches. If you have 60 inches between the wall and the parked car, the cabinet technically fits and functionally does not.
Where each number comes from
Cabinet depth is the published figure, but check whether it includes the handle and the side handle brackets. Many listings quote the box and not the hardware, which adds 1 to 3 inches.
Drawer extension on a full extension slide is close to the full drawer depth, because the point of full extension is that the back of the drawer clears the cabinet face. On a 3/4 extension slide, budget about 75 percent of drawer depth and accept that the back of the drawer stays inside the cabinet.
Body depth is the space a person occupies standing at the open drawer and reaching in. Around 26 inches covers most adults working comfortably. Cut it to 20 inches and you are describing someone leaning over the drawer, which is exactly the posture that makes people stop putting tools back.
Aisle widths that hold up in practice
| Clear aisle after the cabinet is open | What it means |
|---|---|
| Under 12 in | The drawer cannot fully open. You will live with partial extension. |
| 12 to 24 in | One person, turning sideways to pass, cabinet drawers closed. |
| 24 to 36 in | Comfortable single-person working aisle. |
| 36 in and over | Two people pass, a hand truck or a creeper fits through. |
Getting it into the building
The route matters as much as the destination. Measure the narrowest point between the delivery truck and the final position: a service door, a stair turn, a low header. A 72 inch cabinet does not care about a 36 inch door as long as its depth and height clear, because it goes through the door end-on. Its height is what usually stops it.
Once the cabinet is placed, work through the zoning method in garage shop layout, and if you have not settled on a size class yet, tool chest sizes explained maps nominal widths to what actually fits inside them.