GC Column Series Flow – Two Capillary Columns

This GC Column Series Flow Calculator estimates the outlet column flow (referenced to 25 °C and 14.696 psia) and the pressure at the mid-point for two capillary columns connected in series, based on column geometry, carrier gas, temperature, and pressure settings.

GC Column Series Flow Calculator Interface

Connection Diagram

GC column flow series diagram showing two capillary columns connected in series with inlet, mid-point, and outlet pressures

What inputs are required ?

  • Dimensions and temperature of capillary column 1 and 2
  • Column 1 inlet pressure and column 2 outlet pressure
  • Carrier gas

Outputs of GC Column Series Flow Calculator

  • Outlet flow
  • Pressure at the connecting point of the two columns

Before You Go

Want to understand how this calculator works behind the scenes?
The full article with explanation is available at GC Column Series Calculation: How Flow and Pressure Work Across Two Columns in Gas Chromatography Columns series.

This calculator assumes laminar flow through capillary columns and ideal gas behavior at standard reference conditions.

If your setup involves a different column configuration — such as a single column, three columns in series, mid-point pressure supply, or split flow arrangements — explore the other Free Calculators for accurate, configuration-specific results.

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