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

Measured Gap Mm (mm)

Required number input.

Difference between a measured cabinet-door reveal and a 3 mm target; positive values mean the actual gap is wider. 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]

Difference From3 Mm (mm)

The resulting difference from3 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.

• Lichtausschnitt Tuer Glas Groesse

  Calculate rectangular glass cut size from a measured door opening and equal edge clearance on all sides; glazing bite is not included.

• Cabinet Door Gap

  Calculate the center gap of a pair of inset cabinet doors after subtracting door widths and equal side gaps from the opening.

• Finger Joint Count

  Choose the nearest positive integer finger count to a target finger width over a measured joint edge.