The Pressure Drop through the pipe can be calculated when the following values are known:

  • Pipe internal roughness
  • Pipe internal diameter
  • Pipe length
  • Pipe elevation change
  • Fittings
  • Flow rate


The Pressure Drop can be calculated for both Liquids and Gases.  For information about selecting a fluid, see Fluids Database


For more information about working with gases, see: Working with Compressible Fluids


For more information about the theory and formulas used to calculate the pressure loss, see Calculation Theory and Method of Solution