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

Panel count

Number of hinged panels in the folding door.

Compute hinge sets and top track runners for a folding door panel set. 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]

Hinge sets

Number of hinge pairs joining adjacent panels.

Top track runners

Number of runners required in the top track.

• 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.

• Carcase Panel Count Generator

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• Hinge Overlay Type Lookup

  Look up the typical door overlay in millimeters for a hinge mounting type.

• Hardware Bill of Materials Generator

  Summarize hinges, handles, and slide pairs required for a given number of doors and drawers.