Basis Set Exchange

The Basis Set Exchange provides downloadable basis sets for quantum chemistry in formats including NWChem and Gaussian.

basissetexchange.org
Basis Set Exchange homepage screenshot

About Basis Set Exchange

The Basis Set Exchange provides downloadable basis sets for quantum chemistry in formats including NWChem and Gaussian. Users can select sets, view details such as description, version, last update, role, family, function types, notes, and references, and download individual sets or all sets at once. Some elements may not be writable in a selected format.

Key features

  • Downloadable basis sets for quantum chemistry calculations
  • Download in formats including NWChem and Gaussian
  • Bulk download option for all basis sets
  • Basis set details including version, update date, and family
  • References listed for selected basis sets
  • Error reporting and contributions via GitHub or email
Best for: Researchers and students doing quantum chemistry calculations that require basis set files.
Good for
  • Includes version, last update, and reference information for selected sets
  • Provides bulk download of all basis sets
  • Lists contact options for corrections and contributions
Watch out for
  • Some basis set content may not be writable in a selected format

Basis Set Exchange at a glance

Type
Website
Pricing
Not confirmed. Check the site
Platforms
Web
Open source
Not stated
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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Basis Set Exchange FAQ

How do I report a possible error or suggest a basis set addition?
Use GitHub issues for the BSE library project or email [email protected].
How should I cite use of the Basis Set Exchange software?
Cite Pritchard et al., A New Basis Set Exchange: An Open, Up-to-date Resource for the Molecular Sciences Community, J. Chem. Inf. Model. 2019, 59(11), 4814-4820, doi:10.1021/acs.jcim.9b00725.
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