Use this workshop calculation to turn measured dimensions and the selected construction convention into a cut, spacing, fit, or material-planning value.

Domino size

Domino size key as thickness times length, for example 8x40.

Look up the tenon thickness and length of a Festool Domino size. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Tenon thickness (mm)

Tenon thickness in millimeters.

Tenon length (mm)

Tenon length in millimeters.

• Nominal dimensions, kerf, moisture movement, hardware clearances, wall squareness, and manufacturer instructions can change the required shop dimension. Measure the actual assembly and test critical joints on scrap before cutting finished material.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Complement the calculated dimension with a physical story stick, dry fit, or full-size layout. Follow the hardware, coating, adhesive, or machine manufacturer's limits where they differ from a rule of thumb.

• Biscuit Size Lookup

  Look up the width, height, and thickness of a standard biscuit size.

• DIN 68901 Carcase Height Lookup

  Look up the nominal DIN 68901 kitchen carcase height for low, base, and tall size classes.

• Domino Routing Depth Calculator

  Compute the mortise depth for a centered Domino loose-tenon joint. Each workpiece normally receives half the nominal tenon length; verify the joiner's available depth-stop setting, especially for the 4 x 20 mm Domino.