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

Countertop Depth Millimeters (mm)

Required number input.

Cabinet Depth Millimeters (mm)

Required number input.

Rear Allowance Millimeters (mm)

Required number input.

Countertop front overhang beyond cabinet depth after subtracting an optional rear backsplash or wall allowance. 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]

Front Overhang Millimeters (mm)

The resulting front overhang millimeters 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.

• Auszugsschienen Laenge

  Longest drawer-slide length that fits a measured cabinet interior depth after reserving a specified rear clearance; choose an available product size no longer than this result.

• Drawer Slide Length

  Choose the longest supplied drawer-slide size that fits usable cabinet depth after rear clearance; no manufacturer sizes are assumed.

• Cabinet Door Gap

  Calculate the center gap of a pair of inset cabinet doors after subtracting door widths and equal side gaps from the opening.