# Pulay stress and pressure\_GPa

**URL:** <https://discourse.abinit.org/t/pulay-stress-and-pressure-gpa/3777>\
**Category:** Ground state\
**Created:** [November 7, 2025, 3:43pm UTC](https://discourse.abinit.org/t/pulay-stress-and-pressure-gpa/3777 "2025-11-07T15:43:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![quantum\_engineer](https://discourse.abinit.org/letter_avatar_proxy/v4/letter/q/8edcca/32.png) [@quantum\_engineer](https://discourse.abinit.org/u/quantum_engineer)\
**Post date:** [November 7, 2025, 3:43pm UTC](https://discourse.abinit.org/t/pulay-stress-and-pressure-gpa/3777/1 "2025-11-07T15:43:40Z")

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Hello all,

I am wondering how pressure\_GPa is calculated in .abo files. Is this the Pulay stress, or does it contain contributions from other factors as well? I am looking at piezoelectric materials, so I’m interested in separating out the value of the Pulay stress for ground state calculations from any other contributions to stress/strain and then minimising it. Thanks in advance for any assistance.