Pumps
Hydraulic power, shaft power, NPSH, specific speed, affinity laws and preliminary pump selection.
Open calculators →Engineering Tools
Practical, standards-aware calculators for engineers, by an engineer.
Select a discipline to open calculation tools with selectable units, governing formulas, reset controls and calculation history.
Calculator Categories
Delete saved calculation history from every Engineering Calculator on this website.
Hydraulic power, shaft power, NPSH, specific speed, affinity laws and preliminary pump selection.
Open calculators →Velocity, Reynolds number, pressure drop, fittings, equivalent length and line sizing.
Open calculators →Gas properties, compression ratio, discharge temperature, head, power and operating checks.
Open calculators →Steam/gas ejector nozzle, mixing, shock and diffuser checks; liquid eductor flow ratio, sizing, cavitation, staging and pump-down time.
Open calculators →Injection rate, pump capacity, tank autonomy, concentration and package sizing checks.
Open calculators →Tank volume, liquid inventory, thickness, FRP/GRP calculations, retention time and preliminary sizing.
Open calculators →Heat duty, LMTD, exchanger area, utility flow, effectiveness and insulation calculations.
Open calculators →4–20 mA scaling, differential-pressure level, pressure conversion and range checks.
Open calculators →Pressure, flow, temperature, power, energy, viscosity, density and length conversions.
Open calculators →Load demand, transformers, generators, motors, cable sizing, short circuit, protection and power quality.
Open calculators →Material properties, storage bins, conveyors, elevators, feeders, chutes and dust control.
Open calculators →Try another keyword such as pump, piping, compressor, ejector, eductor, tank, electrical, chemical, heat, instrumentation, units, bulk or conveyor.