Engineering Tools
100 free online engineering calculators covering mechanical, structural, civil, electrical, electronics, chemical, aerospace, thermal and industrial engineering — all instant, no sign-up required.
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Free Online Engineering Calculators — 100 Tools Across 10 Disciplines
ToollLive offers 100 free online engineering calculators covering every major engineering discipline — no sign-up, no downloads, instant results. Use our mechanical engineering calculators for beam deflection, torque, gear ratio and stress-strain analysis. Our structural engineering tools cover concrete volume, reinforcement steel, column loads and moment of inertia. Civil engineering calculators include road gradient, earthwork excavation, soil bearing capacity and brick quantity. The electrical engineering section covers Ohm's law, three-phase power, transformer turns ratio and wire sizing. Advanced tools include Reynolds number calculator, Carnot efficiency, Mach number, OEE calculator, PCB trace width, and projectile motion. All calculators are free, mobile-friendly and require no registration. Explore our full suite of math tools, unit converters and data tools for engineers.