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

Outer width (mm)

Required number input.

Outer height (mm)

Required number input.

Outer depth (mm)

Required number input.

Panel thickness (mm)

Required number input.

Generate the bill of materials for a rectangular box carcase from outer dimensions and panel thickness. 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]

Side panels

The resulting side panels returned as an integer.

Top and bottom panels

The resulting top and bottom panels returned as an integer.

Back panels

The resulting back panels returned as an integer.

Total panel area (m²)

The resulting total panel area 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.

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