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

Inside frame width (mm)

Required number input.

Inside frame height (mm)

Required number input.

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

Theoretical brace length (mm)

The resulting theoretical brace 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.

• Stair Stringer Length Carpentry

  Theoretical straight stair-stringer run length from total horizontal run and vertical rise, before end cuts or overhangs.

• Face Frame Rail Length

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

• Tenon Length

  Find maximum tenon insertion length from measured mortise depth after reserving a nonnegative end clearance.