Pilot Hole & Drill Bit Calculator
Look up a starting pilot-hole drill size for common wood-screw gauges in softwood or hardwood.
Results
Reference drill-bit size
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Pilot-hole diameter
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Use the result as a planning estimate and verify manufacturer guidance, material data and project-specific requirements where relevant.
How it works
The tool uses a published straight pilot-hole reference table for common wood screws.
Limitations
- Screw root diameter and thread geometry vary by manufacturer. Treat this as a starting reference and verify the screw maker’s recommendation, especially near edges or with brittle woods.