Desktop CNC 101
Calculators

CNC calculator

CNC Unit Converter

Convert common CNC setup units for tool diameter, cut depth, feed rate, spindle speed, surface speed, angles, and material removal rate.

Converted values

Included CNC units

  • Length: inches, millimeters, meters, feet, and microns.
  • Feed rate: inches per minute, millimeters per minute, inches per second, and millimeters per second.
  • Spindle and surface speed: RPM, RPS, SFM, and meters per minute.

Typical uses

  • Convert metric tooling to inch CAM projects, or inch tooling to metric controller values.
  • Check feed units when moving between CAM software, G-code senders, and controller settings.
  • Convert V-bit angles and surface speed references without leaving the setup workflow.