Drill Speed for Hole Size Calculator

Big holes and hard metal need slower speeds.

Uses typical cutting speeds for HSS bits. Check the bit maker's chart. Everything is worked out in your browser. Nothing is saved or sent anywhere.

1. Hole

2. Your drill

3. Results

How it was worked out

    What this does and doesn't tell you

    • Use cutting fluid in metal and clamp the work. Hole saws and spade bits need slower speeds.
    • Wear eye protection.
    • Lithium-ion tool packs can short, overheat and catch fire if they're damaged, wired wrongly or charged on the wrong charger. Only use the maker's charger for the pack.
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