Unit of PSTRESS

Queries about input and output files, running specific calculations, etc.


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nz72lary
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Unit of PSTRESS

#1 Post by nz72lary » Tue Jun 23, 2026 1:03 pm

Dear VASP-Team,

I'm doing calculations at higher pressures and use the PSTRESS tag for this. On the Wiki Page it says: "The unit of PSTRESS is kB".

Can you please confirm that with "kB", "kbar" = 100 MPa is meant?

Thank you in advance!


michael_wolloch
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Re: Unit of PSTRESS

#2 Post by michael_wolloch » Tue Jun 23, 2026 1:22 pm

Hi nz72lary,

And welcome to the VASP Forum!

The unit kB indeed is kilobar, equivalent to 100 megapascals.

While you are correct that kbar would be much clearer, kB is used consistently in VASP output files and documentation, and changing it to kbar would potentially break a lot of output parsers. Thus, I think it is best to stay with kB and risk occasional confusion with KiloByte.

Let me know if that solves all your issues, and I can lock the topic,
Cheers, Michael


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