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Drill Bit Size Calculator

Result
bit size
Pilot Hole
Clearance Hole

How to Calculate Drill Bit

Use this free drill bit calculator to get instant, accurate results for your construction project. Simply enter your measurements above and the calculator will automatically compute the result using industry-standard formulas.

Pro Tip: Always add 10-15% extra material to account for waste, cuts, and job-site conditions. This is standard practice recommended by experienced contractors.

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