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

Opening Width Mm (mm)

Required number input.

Opening Height Mm (mm)

Required number input.

Clearance Mm (mm)

Required number input.

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

Glass Width Mm (mm)

The resulting glass width mm returned as a number.

Glass Height Mm (mm)

The resulting glass height 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.

• Tuer Blatt Ueberfaltung

  Equal side overlay of a centered door leaf over a narrower clear opening, based on measured leaf and opening widths.

• Edge Banding Trim Allowance

  Calculate total edge-banding width to trim and the equal amount per face when strip is centered on a panel.

• Frame Rabbet Depth

  Size a glazing-frame rabbet from measured glass-and-backing stack thickness plus bedding clearance.