Lathe Speed Calculator

Calculate optimal spindle speeds for turning wood, metal, and plastic with safety validation

For guidance only: Always work within safe tool limits and follow manufacturer recommendations. These calculations are estimates and should be validated with your specific equipment and conditions.

Speed Parameters

Enter workpiece and operation details

Unit System

Metric (mm)

Imperial (inches)

Workpiece Diameter

Diameter in millimeters

Material

Tool Type

Operation Type

Final surface finish

Advanced Settings

Speed Recommendations

Optimal RPM and safety analysis

Enter workpiece details to calculate optimal speed

About this calculator

Lathe Speed Calculator: A machining speed helper for estimating safe spindle RPM targets.

How it works

Select material, tool type, and workpiece diameter.
Enter desired surface speed or machine constraints.
The calculator computes recommended spindle speed ranges.