Kitchen
Kitchen Cabinet Run Planner
How many cabinets fit a wall run, and the filler
Updated July 12, 2026 · Live
What this tool does
Works out how many standard cabinets fit along a wall run once appliance gaps are taken out, and the width of filler panel left over.
Enter the wall length, the cabinet unit width and the total appliance gap; the calculator returns how many cabinets fit and the filler width.
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Formula Used
Works out how many standard cabinets fit along a wall run once appliance gaps are taken out, and the width of filler panel left over. It runs entirely in your browser and shows the working, so you can check every step against your own figures.
How the kitchen cabinet run calculator works
The usable run is the wall length minus the gaps you leave for freestanding appliances. Dividing that by the cabinet unit width and rounding down gives the number of whole units that fit, and the remainder is the filler-panel width needed to close the run neatly against a wall or appliance.
What you enter
Enter the wall length, the cabinet unit width and the total appliance gap; the calculator returns how many cabinets fit and the filler width. Every field is editable, and the result recalculates the moment you change a value.
Reading the result
The unit count and filler width let you order cabinets and a filler strip with confidence. A filler under about 20 mm can usually be absorbed in the end panels; larger gaps want a dedicated filler.
Safe by design
This tool plans layout and quantities. It never sizes a gas connection or an electrical circuit — both are regulated trades that a qualified, registered installer must carry out.
Assumptions and limits
This plans a single straight run. Corners, larder units and integrated appliances change the packing, and worktop overhangs and end panels eat a few millimetres. Use it per run and confirm against the supplier’s unit schedule.
Using it with the rest of BuildMetricLab
This calculator is one step in planning the job. Pair it with the related tools in this category and across BuildMetricLab to go from a single figure to a full costed plan — a sizing figure feeds a cost estimate, a cost estimate feeds a project budget, and each result carries straight into the next tool. Every BuildMetricLab tool runs entirely in your browser — no sign-up, nothing sent to a server, and the formula is shown on the page so the maths can be audited.
Sources & methodology
Works out how many standard cabinets fit along a wall run once appliance gaps are taken out, and the width of filler panel left over. Every result is calculated from the values you enter, all inputs are editable, and no time-sensitive prices or rates are embedded.
Frequently asked questions
What cabinet widths are standard?
Base and wall units commonly come in 300, 400, 500, 600 and 1000 mm widths. Mixing widths lets a run fill a wall with a smaller filler.
What is a filler panel?
A narrow strip that closes the gap between the last cabinet and a wall or appliance, so the run finishes flush. This tool gives the width needed.
Does this handle corners?
No — it plans one straight run. Corner and larder units change the packing, so run it per wall and allow for the corner unit separately.
Should I plan around appliances?
Yes. Enter the total width you are leaving for freestanding appliances so the cabinet count fits the space that is actually left.
Spotted something off?
Calculations or display — let us know.