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

Available Run Mm (mm)

Required number input.

Remaining countertop run after reserving a 5 mm movement gap at a butt joint; check finish and sealant requirements separately. 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]

Usable Run Mm (mm)

The resulting usable run mm 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.

• Clamex P Drilling Pattern

  Look up the P-System groove depth, 6 mm lever-access hole, and minimum butt-joint and miter material thicknesses for Clamex P-10 and P-14 connectors.

• Dovetail Tail Count

  Count complete dovetail tails that fit an available joint width after reserving equal end pins and interior pin widths.

• Arbeitsplatten Ueberstand

  Countertop front overhang beyond cabinet depth after subtracting an optional rear backsplash or wall allowance.