Standard kitchen base cabinets are typically about 24 inches deep (not including the countertop), while standard wall (upper) cabinets are usually about 12 inches deep.

Standard cabinet depths

  • Base (lower) cabinets: Commonly 24 inches deep; with countertop overhang, the total depth is usually about 25–26 inches.
  • Wall (upper) cabinets: Typically around 12 inches deep so they are easy to reach and do not obstruct the workspace.
  • Tall/pantry cabinets: Often match either 12-inch or 24-inch depths to line up with wall or base cabinets.

Variations you might see

  • Shallow base options: 18 or 21 inches deep are used in tight kitchens, narrow walkways, or kitchen islands where a full 24-inch depth would feel cramped.
  • Very shallow cabinets: Depths from 12 to 18 inches are sometimes used for galley kitchens, behind doors, or on the back of islands for extra storage without crowding the space.
  • Custom depths: Some manufacturers offer custom cabinet depths, especially for built-in appliances or unique layouts, but these go beyond standard sizing and may add cost.

Quick planning tips

  • Expect your countertop to stick out about 1–1.5 inches beyond the base cabinet front, which is why overall counter depth is usually about 25–26 inches.
  • When mixing base, wall, and tall cabinets, keeping depths coordinated (12 and 24 inches) helps create a clean, aligned look and avoids awkward overhangs or shadows.
  • If you are remodeling, measure existing appliances (like dishwashers and ranges), since they are designed to sit flush with a standard 24-inch-deep base cabinet line.

TL;DR: Standard kitchen base cabinets are about 24 inches deep; wall cabinets are about 12 inches deep; tall cabinets usually follow one of those two depths, with shallower options available for tight spaces.