Surface Roughness Calculator

Calculate theoretical surface roughness Ra from machining parameters and convert between Ra, Rz, and CLA values.

Feed per revolution for turning, or feed per tooth for milling.
mm/rev
Radius of the cutting tool nose.
mm
Known Ra value to convert to other roughness parameters.
μm

Results

Theoretical Ra (from machining)-μm
Theoretical Rt-μm
Approx. Rz (from Ra)-μm
ISO N-Class-
References: ISO 4287 — Surface Texture; ASME B46.1