Calculator · Machines & tooling
Lathe Speed Calculator
The free Lathe Speed Calculator answers one question: Safe turning RPM by blank diameter. Enter your numbers in inches or millimeters and the result updates instantly in your browser, with no sign-up and no app to install. Use it on your phone at the bench, then copy or print the result for your cut list.
Rule of thumb: diameter (in) × RPM between 6,000 and 9,000. Start low for out-of-round blanks.
Which other machines & tooling calculators help with this project?
- Dust Collection CFM Calculator — Airflow and duct size per machine.
- Router Bit Speed Calculator — Maximum safe RPM by bit diameter.
- CNC Feed Rate Calculator — Feed rate from RPM, flutes and chip load.
- Saw Blade Rim Speed Calculator — Tip speed of a saw blade or sanding disc.
What you'll need for this project
Tools
Screws & hardware
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Build it · Beginner · Half a day
Download the complete plan with cut list and materials list (PDF)
Lathe Tool Rack & Speed Chart — Wall rack for 12 turning tools, with a lathe speed chart insert. Drawings, cut list with board-foot totals, hardware list and step-by-step instructions.