Drawer Box Wizard
Calculate precise drawer box dimensions based on your cabinet opening and slide type. Get a complete cut list for sides, front, back, and bottom panels.
Drawer Configuration
Side-mount slides need 1/2" of clearance on each side of the box (1" total), so the box is built 1" narrower than the opening. Too little clearance and the drawer binds; too much and it racks side to side.
Measure the Opening Width with a tape across the cabinet face — the calculator works out the smaller outside box width and inside cavity width for you.
Cut List
Enter your cabinet opening dimensions to calculate drawer box parts.
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Get Started FreeDrawer Box Basics
Side-Mount Slides
Traditional ball-bearing slides that mount to the sides of the cabinet and drawer box. Require 1/2 inch clearance per side (1 inch total).
- Outside width = Opening width - 1 inch
- Standard lengths: 12", 14", 16", 18", 20", 21", 22"
- Works with 1/2" to 3/4" drawer sides
Undermount Slides (Blum TANDEM)
Premium concealed slides that mount underneath the drawer box. Provide a cleaner look and smoother action.
- Inside width = Opening - 42mm (1-21/32")
- Requires rear notch (min 35mm) and hook bores
- Available in 9", 12", 15", 18", 21" lengths
Blum TANDEM 563H/563 Depth Requirements
| Runner Length | Min Cabinet Depth | Max Cabinet Depth |
|---|---|---|
| 21" (533mm) | 557mm (21.9") | 599mm (23.6") |
| 18" (457mm) | 480mm (18.9") | 522mm (20.6") |
| 15" (381mm) | 404mm (15.9") | 446mm (17.6") |
| 12" (305mm) | 328mm (12.9") | 370mm (14.6") |
| 9" (229mm) | 266mm (10.5") | 299mm (11.8") |
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