Machining Calculators
Reference & Calculation
Interactive Milling Formula Calculator
Solve any variable in the milling equations below. Enter the known values into the fields on the left side of each equation and click Solution — the answer appears on the right.
Legend
Quick reference for the abbreviations used in each calculator below.
DWorkpiece diameter at machining point (in.)
DOCDepth of cut (in.)
SFMSurface feet per minute
RPMRevolutions per minute
IPRInches per revolution
IPMInches per minute
IPTInches per tooth
WOCWidth of cut (in.)
ZNumber of teeth in cutter
Calculators
Six formulas, six calculators — pick the one for the value you need.
Surface Feet Per Minute (SFM)
Revolutions Per Minute (RPM)
Inches Per Revolution Feed Rate (IPR)
Inches Per Minute Feed Rate (IPM)
Inches Per Tooth Feed Rate (IPT)
Metal Removal Rate (in³/min)
Need more machining reference tools? Check the Feed Per Tooth calculator and ANSI/ISO conversion table, or find the right end mill for your job.
Reference: FM Carbide machining formula guidelines.
