Plant, instrumentation & process calculations — in one place
Modular calculators built on transparent, unit-consistent engineering equations. Every estimate shows its formula and assumptions — nothing is a hardcoded lookup.
Engineering Calculator Hub is a free collection of calculators for power plant, instrumentation, electrical, civil, and mechanical engineering work — thermal plant estimation, turbine and boiler protection trip parameters, control loop simulation, 4–20 mA and DP-to-flow conversions, RTD and thermocouple tables, PID tuning, short-circuit and relay coordination studies, motor and transformer protection settings, SIL/PFDavg verification, HVAC load estimation, and a full SAMA logic diagram simulator with genuine time-stepped dynamic blocks, alarm management, and a real Auto/Manual PID faceplate. Every calculator states how it was verified — against a published standard, a standard method with its scope noted, or as an order-of-magnitude estimation tool — rather than presenting every result with the same unearned confidence.