Observed arrival · 2026-08-26
Industrial Calculators, for the Engineering Math You Actually Need
A free browser-based collection of 82 mechanical engineering calculators covering design, manufacturing, fluid power, GD&T, CNC, and shop work.
Field notes
The collection is divided into practical engineering areas, with Mechanical accounting for 37 listed calculators and Machining & CNC for 11. Individual tools expose concrete calculation modes rather than only naming a topic: the beam tool covers six textbook cases and an L/360 check, while the hydraulic-cylinder tool calculates extend and retract force from pressure, bore, rod, and oil flow. The homepage also includes search, category navigation, an About page, contact information, and terms.
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One card from the complete issue