Drawer Slide Calculator

Inputs

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Used for guidance notes only. Enter the exact clearance and prep values from the hardware instructions.
Approximate extension travel relative to nominal slide length.
Finished opening width inside the face frame or cabinet sides.
in
Finished drawer opening height before top and bottom clearance.
in
Usable inside depth from the front reference plane to the back obstruction.
in
Clearance between each drawer side and the cabinet opening. Many side-mount slides use 1/2 in per side.
in
Clearance above the drawer box.
in
Clearance below the drawer box for slide hardware and reveal.
in
Distance from the front reference plane to the slide or drawer box front reference.
in
Clearance for the cabinet back, rear bracket, bumper or obstruction.
in
Catalog rounding increment used to choose a slide length at or below available depth.
in
Used only to estimate inside drawer width after box width is calculated.
in

Results

Default result
Edit inputs
Drawer box width(W_box)
20in
Pass

opening width minus side clearance on both sides

Also computed

Drawer box height(H_box)Pass5in

opening height minus top and bottom clearance

Available slide depth(D_avail)Pass22.375in

cabinet depth minus front setback and rear clearance

Recommended slide length(L_slide)Pass22in

rounded down to the entered slide length increment

Recommended box depth(D_box)22in

uses the rounded slide length as a first-pass box depth

Depth reserve(D_res)Pass0.375in

available slide depth minus selected slide length

Required cabinet depth(D_req)22.625in

selected slide length plus front setback and rear clearance

Drawer slide sizing preview: 20.00 inch box width, 22 inch slideDrawer slide sizing previewOpening clearance sets box width; cabinet depth sets usable slide length.finished openingside clearanceside clearanceslide length22 indepth reserve0.37 inDrawer box outside width20.00 inDrawer box height5.00 inEstimated travel22.00 in
Method notes 4 notes
  • Drawer box width = opening width - 2 x side clearance.
  • Available slide depth = cabinet inside depth - front setback - rear clearance.
  • Recommended slide length is rounded down to the entered catalog increment so the slide fits the available depth.
  • This is a side-mount slides usually need a fixed clearance per side; verify the exact model. It does not replace manufacturer instructions for locking clips, notch dimensions, rear brackets, disconnect clearance, face-frame brackets, drawer-front reveal, load rating, screw pattern or soft-close hardware.

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