Pumping Power Calculator - Version 3.0 Calculates the pump power of fluids. This calculator supports two different units of measurements. SI Units and US Units. Easy to use.Pumping power calculator will accept input in SI and Metric measurement units and will calculate the following:1) Pump hydraulic power 2) Shaft power3) Motor powerThe calculation results are displayed in four different measurement units. Btu/hrkWhp (British)hp (Metric)