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

Artwork width (mm)

Required number input.

Total fit allowance (mm)

Required number input.

Visible opening width (mm)

Required number input.

Find equal artwork overlap on both sides from artwork plus fit allowance versus the visible frame aperture. 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]

Rabbet lip overlap per side (mm)

The resulting rabbet lip overlap per side 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.

• Workbench Vise Jaw Width

  Minimum vise jaw width needed to cover a workpiece plus equal clamping margins on both sides.

• Edge Banding Trim Allowance

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

• Polygon Frame Miter Angle

  Find each saw miter angle from a square cut for a regular polygon frame with equal sides and interior angles.