All machinist calculators and charts

Every calculator and chart here is free and runs in your browser. No download, no signup.

Speeds and feeds

Spindle RPM, SFM, feed per tooth, IPM and metal removal rate.

  • Machining formulas Guide
  • Spindle speed (RPM) calculator Calculator
  • Feed rate conversions (IPR, IPM) Coming
  • Metal removal rate calculator Coming
  • CNC milling calculators Coming
  • CNC turning calculators Coming
  • Surface finish calculator Coming
  • Drilling speeds and feeds Coming

Holemaking and tapping

Tap drills, percent of thread, center drills and countersinks.

Threading and thread measuring

Thread formulas, 3-wire measuring and lathe threading cycles.

Inspection and GD&T

True position, blueprint symbols, dovetails and gage setups.

Layout and shop math

Bolt circles, hole coordinates, circle centers and shop trig.

CNC programming and alarms

G-code examples, tool nose radius compensation and alarm lookups.

Manual machining

Tapers, tailstock offset, cross slide infeed and dividing heads.

  • Taper calculator Calculator
  • Lathe tailstock offset for tapers Coming
  • Lathe cross slide infeed Coming
  • Vise and soft jaws Coming
  • Manual machining calculators Coming
  • Dividing head calculator Coming
  • Rotary axis feed rate Coming

Tooling and hardware

Cap screws, keyways, T-slots, collets and gears.

  • Wheel bolt patterns Chart
  • Socket head cap screw dimensions Coming
  • Keyway dimensions Coming
  • Spur gear calculator Coming
  • Metal weight calculator Coming
  • Woodruff keyseat cutters Coming
  • T-nuts and T-slots Coming
  • Collet sizes Coming
  • Tooling and hardware calculators Coming

Shop power

Single-phase and 3-phase power for machine tools.

  • Shop power guides Coming

Reference charts

Real HTML tables with a print-friendly version.

Guides

Step-by-step methods with a worked example.

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