Inches Per Minute Calculator
CPT × Z × RPM = IPM

This free Inches Per Minute (IPM) calculator helps machinists and CNC programmers quickly determine the optimal feed rate for milling, turning, drilling, and other machining processes. By inputting chip load, spindle speed, and number of cutting edges, users obtain accurate feed rates that improve tool life, surface finish, and overall machining efficiency. This tool reduces guesswork, speeds up setup, and minimizes tool wear or breakage, streamlining manufacturing operations for better productivity.

Please enter valid values for all fields.
Inches Per Minute (IPM) — inches per minute
Abbreviation Meaning
CPTChip Load Per Tooth
ZNumber of Teeth
RPMRevolutions Per Minute
IPMInches Per Minute