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

Cabinet opening width (mm)

Required number input.

Left door width (mm)

Required number input.

Right door width (mm)

Required number input.

Each outer side gap (mm)

Required number input.

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

Center door gap (mm)

The resulting center door gap 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.

• Fence Picket Spacing

  Calculate equal clear gaps between fence posts, pickets, and both ends from opening width and uniform picket width.

• Door Frame Width With Gaps

  Compute door frame inner width and total side gap from the leaf width and per-side clearance.