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

Recess Diameter Millimeters (mm)

Required number input.

Interference Millimeters (mm)

Required number input.

Nominal plug-cutter diameter for a drilled recess when a chosen diametral interference is desired; verify actual plug yield and grain fit. 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]

Cutter Diameter Millimeters (mm)

The resulting cutter diameter millimeters returned as a number.

• 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.

• Duebellaenge 5x Durchmesser

  Rule-of-thumb wooden dowel length equal to five times dowel diameter; verify actual embedment and joint design.

• Mortise Width

  Size mortise width to receive a measured tenon thickness plus chosen side-to-side fit clearance.

• DIN 68901 Carcase Height Lookup

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