# Viscosity calculation for Ionic Liquid

**URL:** <https://gromacs.bioexcel.eu/t/viscosity-calculation-for-ionic-liquid/12744>\
**Category:** User discussions\
**Tags:** analysis-tools\
**Created:** [October 9, 2025, 9:29am UTC](https://gromacs.bioexcel.eu/t/viscosity-calculation-for-ionic-liquid/12744 "2025-10-09T09:29:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kavita](https://avatars.discourse-cdn.com/v4/letter/k/f05b48/32.png) [@kavita](https://gromacs.bioexcel.eu/u/kavita)\
**Post date:** [October 9, 2025, 9:29am UTC](https://gromacs.bioexcel.eu/t/viscosity-calculation-for-ionic-liquid/12744/1 "2025-10-09T09:29:10Z")

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GROMACS version:  
GROMACS modification: Yes/No  
Here post your question

command line to calculate shear viscosity via Einstein and Bulk viscosity via Green kubo relation.

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**Author:** ![obZehn](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/obzehn/32/2629_2.png) [@obZehn](https://gromacs.bioexcel.eu/u/obZehn)\
**Post date:** [October 9, 2025, 11:53am UTC](https://gromacs.bioexcel.eu/t/viscosity-calculation-for-ionic-liquid/12744/2 "2025-10-09T11:53:04Z")

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Take a look at [gmx energy](https://manual.gromacs.org/current/onlinehelp/gmx-energy.html), specifically the `-visco`, `-evisco`, and `-eviscoi` flags.