Wood Screw Calculator

Find the right screw size, pilot hole, and clearance hole for your wood project.

Pilot Hole Diameter
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Clearance Hole
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Countersink Dia.
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Screw Shank Dia.
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Thread Penetration
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Recommendations

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Wood Screw Sizing Guide

  • Always pre-drill pilot holes in hardwood to prevent splitting
  • Screw penetration: At least 1" into the receiving piece, or 2/3 of screw length
  • Clearance hole: Drill through the top piece so only threads grip the bottom piece
  • The Rule of Thirds: 1/3 in top piece, 2/3 in bottom piece

Verwandte Rechner

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Wood weight estimator.

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Beam span calculator.