Interactive Milling Formula Calculator

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)
×
× π/12 =
Revolutions Per Minute (RPM)
× 12/π
=
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.

Feed Per Tooth Calculator ANSI/ISO Conversion Table Take the End Mill Quiz →
Reference: FM Carbide machining formula guidelines.
Dialed in your feeds & speeds? Run them on tools built for it: Turbo end mills, multi-flute finishing mills, or our best sellers — or ask our engineering team for a recommendation. FM Carbide helps you machine better!

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