The design basis for new columns can be approach to flood, maximum capacity or pressure drop. S.I., Metric and English units are supported and the program can convert between these system of units. The Eckert and Robbins correlations are both included to cover the full range of liquid flowrates. Calculated results can be printed in tabular form, and plotted as a Generalized Pressure Drop Correlation diagram or as an Operating Diagram. Packed Column Calculator offers hydraulic design and rating calculations for packed columns and towers.Limitations: