Woodturning Calculator
Convert between workpiece RPM and surface speed for a measured turning diameter.
Results
Spindle speed
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Surface speed
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Surface speed
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Surface speed
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Use the result as a planning estimate and verify project-specific measurements, manufacturer information and local requirements where relevant.
How it works
Surface speed is circumference times RPM. Reverse mode solves the same relationship for RPM.
surface speed = π × diameter × RPMLimitations
- This is a conversion tool, not a safe-speed recommendation. Workpiece balance, material, mounting method, lathe rating and tooling all affect appropriate RPM.