Kitchen cabinet dimensions describe different things depending on where you measure. A cabinet frame, a finished cabinet with doors and a countertop can have different depths. An appliance's overall size is different again from the opening it needs.
Start with the selected cabinet system's width, depth and height. Then add the fronts, supports, finishing panels and installation requirements shown on the project drawings. A reference size helps you plan; it does not authorize manufacture.
Start with Reference Sizes from an Identified System
There is no single worldwide cabinet size schedule. Even within one market, a cabinet with a built-in base can list a different height from a box that needs separate legs.
The table gives selected IKEA U.S. SEKTION frame references, not George sizes or a complete product range. Dimensions are in inches. Width options depend on the cabinet type; not every combination exists.
| Cabinet type | Example frame widths | Listed system depth | Frame height |
|---|---|---|---|
| Base | 12, 15, 18, 24, 30, 36 | 24; selected shallow versions 14 3/4 | 30, excluding separate legs and countertop |
| Wall | 12, 15, 18, 24, 30, 36 | 14 3/4 | Selected versions 15, 20, 30, 40 |
| Tall | 15, 18, 24, 30 | 24; selected shallow versions 14 3/4 | 80 or 90, excluding separate legs |
In these references, “system depth” includes the suspension rail used to mount the cabinet. For example, the listed 30-inch-wide base frame is 23 5/8 inches deep without that rail and 24 inches with it. Its door and countertop are separate parts. This is why copying a number labeled “depth” into another supplier's drawing can create an error.
For metric coordination, one inch equals 25.4 mm. Convert the stated value without silently rounding it to a nearby module: 24 inches is 609.6 mm, not 600 mm. Keep the original unit beside the conversion. A 600 mm cabinet can be a valid selection, but it is a different nominal size.
Define Where Each Measurement Starts and Ends
Put the measurement reference beside the number. For each cabinet, distinguish:
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External frame size: the outside of the cabinet box, with the included rail, base or other parts identified.
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Finished cabinet envelope: the space occupied after doors, handles and decorative panels are included.
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Internal clear space: the unobstructed space available after panels, fittings and any service routes.
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Countertop size: finished depth, thickness and overhang, including the reference wall or cabinet edge.
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Appliance opening: the space required by the selected appliance's installation document.
A 600 mm external width does not mean 600 mm of usable interior. In a simplified box with two 18 mm sides, the distance between those sides is 600 − 18 − 18 = 564 mm. Hinges, runners or other fittings can reduce the usable space further. This is an arithmetic illustration, not a cabinet specification or a storage-fitting approval.
The Framed and Frameless Guide explains why the front opening and usable storage also need separate checks.
Measure the Room from Finished Surfaces
Record wall lengths, ceiling heights, corners, doors, windows, beams and service positions. Identify whether each measurement is to a finished surface or to structure awaiting plaster, tile or flooring.
Measure critical runs at more than one height and note differences. A single wall length can hide a taper or an out-of-square corner. The installer needs the actual observations to decide how the cabinets will be aligned and where fitting adjustments can occur.
Record the total length of each run and the consecutive measured segments between the same endpoints. Check that those segments add up to the total. If they do not, investigate before choosing a production dimension. Do not average conflicting measurements into a production dimension.
For repeated apartments, a shared layout is useful, but it does not prove that every room is identical. Record room exceptions against the relevant cabinet and drawing revision.
Use the Appliance Opening, Not Just the Product Width
An appliance sold as “24-inch” does not necessarily have a 24-inch-wide body, and its body width is not a cutout instruction.
For example, the Bosch U.S. SHP78CM5N specification sheet lists an overall appliance width of 23 9/16 inches. Its summary gives a required opening (“cutout”) width of 24 inches. The same sheet lists overall depth of 23 3/4 inches and a summary cutout depth of 24 inches. These figures explain the distinction for that model; they are not dimensions for every dishwasher.
Before making an opening, use the model's current installation instructions and detailed diagrams, including permitted adjustment, connection positions and adjoining-cabinet conditions. A summary specification table is not a substitute for the installation instructions. The appliance example does not establish George supply of that model.
Check the interfaces that can defeat an apparently adequate opening:
| Interface | What to check on the actual drawings |
|---|---|
| Dishwasher beside a drawer base | Open door, drawer and handle paths; connections and access after fitting |
| Refrigerator beside a wall | Required door opening for use and drawer removal, handles and ventilation |
| Oven in a tall unit | Supported opening, ventilation routes, front projection and service access |
| Cooktop over drawers | Cutout, below-appliance space and any required separation or protection |
| Sink over storage | Bowl, waste fittings, faucet connections and drawer movement |
If the model is unselected, identify the opening as provisional. Have the appliance selector supply the installation document, then ask the cabinet designer and installer to review the affected unit. Pricing can continue against a stated assumption; cutting the affected parts should wait for approval.
Account for Panels, Fillers and Movement
A filler is a panel that closes a gap beside a cabinet. It may also provide room for a door or handle to open. An exposed end panel finishes a visible side and can add to the length of the run.
Do not allocate every remaining millimeter to storage. The layout must retain the space needed for the selected fronts, handles, corner fittings and site adjustments.
Consider this hypothetical 2,800 mm run, shown only to illustrate a dimension check:
| Item from left to right | Width |
|---|---|
| Left filler | 82 mm |
| Left end panel | 18 mm |
| Sink cabinet | 800 mm |
| Drawer cabinet | 600 mm |
| Dishwasher opening | 600 mm |
| Storage cabinet | 600 mm |
| Right end panel | 18 mm |
| Right filler | 82 mm |
| Total | 2,800 mm |
The sum fits the stated wall, but that alone does not make the layout buildable. The 600 mm appliance opening and 82 mm fillers still need model and movement checks. If those checks require a larger opening or filler, revise the cabinet selection or arrangement; do not simply reduce a required clearance.
Also check aisle space between the facing finished parts, including countertop edges or handles that project into the aisle. Measuring between bare cabinet boxes can overstate the space available. Show handles and open doors or drawers where they affect use. Required circulation and accessibility depend on the project and applicable local requirements; a furniture-size chart cannot settle them.
Keep a Dimension Record for Each Decision
Use IDs to connect field measurements, cabinet drawings and appliance documents. This blank record can accompany a layout:
| Reference | Dimension and measurement points | Evidence and status | Who resolves an open item |
|---|---|---|---|
| Wall A | Finished wall length at stated heights | Site record, date and room ID | Site measurer or installer |
| B-01 | External width, depth and height; included parts | Cabinet drawing and revision | Cabinet designer |
| AP-01 | Opening width, depth and height | Selected appliance document and version | Appliance selector and cabinet designer |
| F-01 | Filler width and adjacent movement check | Plan/elevation detail and review | Designer and installer |
| CT-01 | Countertop edge, overhang and support interface | Countertop drawing or plan for final site measurements before fabrication | Countertop fabricator |
Keep the measured value, proposed dimension and approval status in separate fields. “Measured” does not mean “approved for manufacture.” If a later site measurement changes, identify all affected cabinets, panels and openings before releasing a revision.
The Cabinet Quality Checklist provides the next step for checking the approved requirements against the supplied pieces.
For the wider ordering sequence, use the Cabinet Procurement Guide.
Send a Layout That Can Be Checked
Use Cabinetry and Wardrobe to review the category and inquiry inputs. When you Request a Cabinet Discussion, send the plan and elevations, cabinet quantities, finished-surface measurements, appliance documents, destination and target dates.
Mark missing measurements and undecided models. A visible open item gives the team a specific coordination task before the order reaches production.
