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) Calculator
- Metal removal rate calculator Calculator
- CNC milling calculators Hub
- CNC turning calculators Hub
- Surface finish calculator Calculator
- Drilling speeds and feeds Calculator
Holemaking and tapping
Tap drills, percent of thread, center drills and countersinks.
- Tapping formulas Guide
- Center drill sizes and depth Chart
- Countersink calculator Calculator
- Drill size chart Chart
- Tap drill chart Chart
- Tapping calculator (inch and metric) Calculator
- Thread percentage calculator Calculator
- Peck drilling calculator Calculator
- Drill point length calculator Calculator
Threading and thread measuring
Thread formulas, 3-wire measuring and lathe threading cycles.
- 3-wire thread measuring Calculator
- Acme 3-wire thread measuring Calculator
- CNC threading formulas Guide
- Threading calculators (Unified and metric) Hub
- Acme thread calculator Calculator
- Metric trapezoidal 3-wire measuring Calculator
- Metric trapezoidal thread calculator Calculator
- G92 threading cycle example (Fanuc lathe) Guide
Inspection and GD&T
True position, blueprint symbols, dovetails and gage setups.
- How to calculate true position Guide
- Blueprint and GD&T symbols Chart
- Measuring dovetails with pins Calculator
- True position calculator Calculator
- Gage block stack calculator Calculator
- Sine bar calculator Calculator
- V-groove measuring calculator Calculator
- QC inspection calculators Hub
Layout and shop math
Bolt circles, hole coordinates, circle centers and shop trig.
- Bolt circle calculator Calculator
- Circle center from 3 points Calculator
- Circle segment calculator Calculator
- Hex, square and octagon across corners Calculator
- Degrees to decimal degrees Calculator
- Geometry and trig calculators Hub
- Hole location calculator Calculator
- Right triangle solutions Calculator
- Area calculators Calculator
- Metric conversions for machinists Calculator
CNC programming and alarms
G-code examples, tool nose radius compensation and alarm lookups.
- Tool nose radius compensation Guide
- G92 threading cycle example (Fanuc lathe) Guide
- G72 facing cycle explained Guide
- Fadal G-codes Chart
- G and M codes list Chart
- Fanuc alarm codes Chart
Manual machining
Tapers, tailstock offset, cross slide infeed and dividing heads.
- Taper calculator Calculator
- Lathe tailstock offset for tapers Calculator
- Lathe cross slide infeed Calculator
- Vise and soft jaws Guide
- Manual machining calculators Hub
- Dividing head calculator Calculator
- Rotary axis feed rate calculator Calculator
Tooling and hardware
Cap screws, keyways, T-slots, collets and gears.
- Wheel bolt patterns Chart
- Socket head cap screw dimensions Chart
- Keyway dimensions Chart
- Spur gear calculator Calculator
- Metal weight calculator Calculator
- Woodruff key chart Chart
- T-slot dimensions and T-nuts Chart
- Collet chart Chart
- Tooling and hardware calculators Hub
Shop power
Single-phase and 3-phase power for machine tools.
- Shop power guides Coming
- Machine tool lease and loan calculator Calculator
Reference charts
Real HTML tables with a print-friendly version.
Guides
Step-by-step methods with a worked example.
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