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Machining Calculators & Engineering Resources

Your all-in-one resource for machining calculators, engineering data, and technical handbooks.

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Featured Calculators

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Speeds & Feeds

Calculate RPM and Feed Rates for various materials using Metric or Imperial units.

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Tap Drill Chart

Find the perfect drill size for standard threads or calculate engagement percentage.

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Unit Converter

Universal converter for length, weight, volume, temperature, and machining specific units.

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Knowledge Base

Machinist's Handbook

Access a curated digital version of standard engineering references and material data.

  • Material Hardness Scales
  • G-Code & M-Code Glossary
  • Fit & Tolerance Classes
  • Surface Finish Standards
Open Digital Handbook