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

Opening height (mm)

Finished opening height in millimeters.

Floor clearance (mm)

Gap between the finished floor and the bottom of the leaf in millimeters.

Compute the finished door leaf height from the opening height minus the floor clearance below the leaf. 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]

Finished leaf height (mm)

Door leaf height to cut in millimeters.

• 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.

• Tuer Luft Spalt

  Equal left and right side clearance of a centered door leaf inside a wider clear opening.

• Kuechen Haengeschrank Montagehoehe

  Height of the bottom of a wall cabinet above the finished floor from countertop height and desired worktop-to-cabinet clearance.

• Lichtausschnitt Tuer Glas Groesse

  Calculate rectangular glass cut size from a measured door opening and equal edge clearance on all sides; glazing bite is not included.