GC Column Splitter Flow Calculator (3 Capillary Columns)

This GC column splitter flow calculator models a three-column splitter configuration where one inlet column feeds two outlet capillary columns through a shared split junction.
It calculates individual outlet flows for all columns, the splitter junction pressure, and flow ratios to support GC method development and flow balancing.


GC Column Splitter Flow Calculator Interface


Connection Diagram

GC column splitter flow diagram showing one inlet column split into two outlet capillary columns

What inputs are required ?

  • Dimensions and temperature of capillary column 1, 2 and 3
  • Column 1 inlet pressure
  • Column 2 and 3 outlet pressure
  • Carrier gas

Output of GC Column Splitter Flow Calculator

  • Outlet flow of column 1, 2 and 3
  • Splitter junction pressure
  • Split flow ratio between column 2 and 3

Before You Go

Want to understand how this calculator works behind the scenes?
The full article with explanation will be published soon at GC Hardware.

Before you go, you may want to explore:

  • How the calculator changes with column length or internal diameter
  • Comparisons between splitter and series column configurations
  • Other GC calculators for midpoint pressure control

Accurate splitter flow calculations help prevent detector starvation, uneven peak shapes, and unstable GC methods.

Browse related calculators below:

If your system uses a different column connection — such as a single column, two-column series, mid-point pressure supply, splitters, or combiners — explore the other GC column flow calculators at Free GC Calculators for configuration-specific flow and pressure calculations.

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