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

Panel width (mm)

Required number input.

Lamella count

Required integer input.

Recommend a solid wood lamella width capped at 80 millimeters for a panel width and lamella count. 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]

Recommended lamella width (mm)

The resulting recommended lamella width 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.

• Glue-Up Ring Alternation Rule

  Compute the growth-ring alternation interval and recommended maximum lamella width for edge-glued panels.

• 4-Inch Baluster Spacing

  Count equal-width balusters and calculate equal clear gaps, including both end gaps, so none exceeds a four-inch maximum.

• Dado Width

  Allow a dado to fit a measured panel thickness with explicit total width clearance.