Source record / 2026
The International System of Units (SI), 9th edition, updated 2026
Bureau International des Poids et Mesures
Reference
Publication
BIPM SI Brochure · 2026
DOI: 10.59161/AUEZ1291
Why it is in this atlas
Official current brochure page verified. The ninth edition began in 2019; the publisher lists this updated version and citation in 2026.
Citation identity and relevance checked 2026-10-18. Check the original version and supplementary material before using a result. Inclusion does not imply endorsement by the authors.