RPM & Cutting Speed Calculator

Convert between spindle speed (RPM) and cutting speed (m/min) for CNC machining operations - milling, drilling, turning, and more. Tailored for South African manufacturing with metric measurements.

Optimized for Manufacturing, Engineering, Mining & Construction sectors

Company Information

Conversion Type

Machining Parameters

Common: 3, 6, 8, 10, 12, 16, 20, 25 mm

Surface speed at cutting edge

Material & Tool Type

Most common material in SA manufacturing

๐Ÿ“ Formula Reference

Cutting Speed to RPM:
RPM = (Cutting Speed ร— 1000) รท (ฯ€ ร— Diameter)
Where: ฯ€ = 3.14159, Cutting Speed in m/min, Diameter in mm
RPM to Cutting Speed:
Cutting Speed = (ฯ€ ร— Diameter ร— RPM) รท 1000
Result in m/min (metres per minute)