Free · formula-visible · US + metric

Pump Calculators

Free hydraulic and pump-sizing calculators — each shows its formula, its units, and a worked example. US and metric.

41 tools available No sign-up · no black-box answers
Hydraulics Fluid Velocity to Velocity Head Calculator Convert fluid velocity to velocity head, or velocity head back to fluid velocity. Enter either Vf or Hv… Open calculator Hydraulics Piping Fitting and Valve Losses Calculator Determine head loss through a pipe fitting or valve from flow rate, pipe inside diameter, and loss factor… Open calculator Hydraulics Single-Acting Pump Displacement Calculator Determine theoretical displacement flow for a single-acting plunger pump from plunger count, plunger diameter, rotating speed, and stroke… Open calculator Hydraulics Throat Bushing Flush Velocity Calculator Determine average fluid velocity through a centered throat-bushing annulus from flow rate, diametrical clearance, and shaft diameter, or… Open calculator Power & Energy Kilowatt Calculator — Direct Current Power Supply System Determine direct-current electrical power in kilowatts from DC voltage and current, or enter any two variables to solve… Open calculator Power & Energy Kilowatt Calculator — AC Two-Phase Power Supply (4-Wire) Determine total kilowatts for a genuine two-phase, four-wire AC load from per-phase RMS voltage, per-phase RMS current, and… Open calculator Power & Energy Kilowatt Calculator — AC Three-Phase Power Supply System Analyze a balanced three-phase AC circuit using kilowatts, line-to-line RMS voltage, power factor, and line RMS current. Enter… Open calculator Power & Energy Kilowatt Calculator — AC Single-Phase Power System Analyze a single-phase AC circuit using kilowatts, RMS voltage, power factor, and RMS current. Enter any three variables… Open calculator Power & Energy Horsepower Calculator — Direct Current Power Supply Determine the useful horsepower of a direct-current load from DC voltage, current, and efficiency. Enter any three variables… Open calculator Power & Energy Horsepower Calculator — AC Two Phase (4-Wire) Power Supply Analyze a two-phase 4-wire AC motor circuit: horsepower, per-phase voltage, efficiency, power factor, and per-phase current. Enter any… Open calculator