Engineering Calculators & Advice Service Status
Precision machining, fabrication, and maintenance tools at your fingertips.
Use bounded arithmetic and read stated method limits.
Engineering Calculators
Speed & Feed, Bolt Torque, CFM/SCFM, Cut List Optimizer, and Watts/Amps Load Planner
Advice Service Status
Personal tool selection, repair diagnosis and PPE advice are unavailable. Static status pages explain the limits and link to public resources.
Technical Guides
62 material–operation planning pages with source links; two unsupported welding guides are withdrawn.
Featured calculator
Air-Compressor CFM ↔ SCFM Calculator
Convert actual CFM to SCFM and back from gauge pressure, temperature, altitude and humidity. The page documents the exact formula, the reference conditions it uses and two worked examples.
Tools and reference status
Explore material and operation boundaries · Personal advice service status · Purpose and editorial limits