WoodWorkCalc guide
Kerf Calculator in Millimeters: Plan Every Saw Cut
Metric cut lists need the same kerf allowance as imperial ones. The blade still removes material on every separating cut, so the important numbers are the actual blade width in millimeters and the number of cuts in the layout.
At a glance
The shop-ready workflow
- 1
Measure the kerf you actually cut
Define the inputs before you commit material or time.
- 2
Add kerf between parts, not after the fact
Use the calculation to make the decision visible and repeatable.
- 3
Keep trim and kerf separate
Turn the result into a protected next action for the shop or client.
Calculator explainer
See what the tool is doing
Blade width + number of cuts
Kerf × cuts = consumed stock
A realistic cut-list allowance
Saw Blade Kerf Calculator →Known measurement + target unit
Convert before the cut list is final
Consistent metric shop dimensions
Metric Converter →Stock size + parts + kerf
Nest parts while preserving allowances
A safer purchase and cut plan
Cut List Optimizer →Measure the kerf you actually cut
Use the blade specification or make a test kerf in scrap and measure it. Nominal blade labels, tooth set, material, and saw setup can differ from the material removed in the actual cut.
Add kerf between parts, not after the fact
Place the kerf allowance between adjacent components in the layout. A part can be exactly the right finished size on paper and still come up short if the blade loss is not included.
Keep trim and kerf separate
Kerf is material turned into sawdust. Trim allowance is extra stock left so a part can be squared, jointed, or brought to final size. Both belong in a reliable cut list.
Common questions
Answers before you start the job
How do I calculate saw kerf in mm?
Measure or confirm the blade kerf in millimeters, then multiply by the cuts that separate parts in the layout. Add it between parts before you buy or cut stock.
What is a typical thin kerf saw blade in mm?
Blade kerf varies by blade and saw. Use the actual blade specification or a measured test cut instead of relying on a generic value.
Is kerf the same as cut width?
For cut-list planning, kerf is the width of material removed by the blade—the gap the cut leaves behind.