Calculation tools
Calculate from known inputs.
Choose the quantity you need. Each tool shows its input units, formula and limits.
Free thermal expansion
Use an explicit mean coefficient and temperature interval.
Calculate length change →Clearance & interference
Enter four actual size limits in the same unit.
Open calculator →Linear tolerance chain
Combine signed dimensions and explicit symmetric tolerances.
Open calculator →Thermal bore expansion
Estimate temperature rise from supplied expansion conditions.
Open calculator →Turning RPM & feed
Use diameter and your chosen cutting speed. Check spindle limits and feed per revolution.
Calculate turning settings →Basic thread dimensions
Use the nominal diameter and pitch. Basic geometry is separate from tolerance limits.
Calculate thread geometry →Tapping drill lookup
Find a thread first, then check a source-linked drill or explicitly labelled estimate.
Find the tapping drill →Roughness units: µm ↔ µin
Convert units while keeping Ra as Ra or Rz as Rz. A fixed Ra-to-Rz conversion is not available.
Convert roughness units →More engineering calculators
Use a calculator, then check its formulas, assumptions and stated sources.