Drill Bit Size Converter (mm ↔ inch)

Instantly convert between metric (mm) and imperial (inch) drill bit sizes. This drill bit conversion tool also shows you the closest standard fractional bits from a complete drill bit size chart, making it easy to find the right bit for the job.

Find the Right Drill Bit Set

A complete set ensures you always have the exact size you need. Check out these top-rated sets. (As an Amazon Associate, we earn from qualifying purchases.)