Packed Column Calculator performs hydraulic design and rating calculations for packed columns and towers. The design basis for new columns can be approach to flood, maximum capacity, or pressure drop. It includes a database of packing types, but custom data can be used as well. It supports S.I., metric, and english units, and can convert between these system of units.The Eckert and Robbins correlations are included to cover the full flowrate range. Results can be printed in tabular form, and plotted as a Generalized Pressure Drop Correlation diagram or as an Operating Diagram. It includes a detailed manual and tutorial in Word v6 format.