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

Overall face-frame width (mm)

Required number input.

Left stile width (mm)

Required number input.

Right stile width (mm)

Required number input.

Find butt-jointed face-frame rail length between left and right stiles from overall face-frame width. 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]

Between-stiles rail length (mm)

The resulting between-stiles rail length 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.

• Gate Diagonal Brace Length

  Find the straight corner-to-corner brace length of a rectangular gate frame; excludes joinery and end cuts.

• Picture Frame Rabbet Width

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

• Sprossen Teilung Gleichmassig

  Equal clear opening width between identical muntins across a frame, including both end gaps.