redefinition of SI base units

revised definitions of the SI base units, adopted at the 26th General Conference on Weights and Measures (CGPM), that came into force on 20 May 2019
Event change Q3076763
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Summary

redefinition of SI base units is a change[1]. It draws 265 Wikipedia views per month (change category, ranking #97 of 11).[2]

Key Facts

  • redefinition of SI base units's instance of is recorded as change[3].
  • redefinition of SI base units's instance of is recorded as Wikibase reason for deprecated rank[4].
  • redefinition of SI base units's Commons category is recorded as 2019 redefinition of the SI base units[5].
  • redefinition of SI base units occurred on November 16, 2018[6].
  • redefinition of SI base units's significant event is recorded as coming into force[7].
  • redefinition of SI base units's facet of is recorded as International System of Units[8].
  • redefinition of SI base units's facet of is recorded as SI base unit[9].

Body

When and Where

redefinition of SI base units occurred on November 16, 2018[6].

Context

Recorded instance of include change[3] and Wikibase reason for deprecated rank[4].

Why It Matters

redefinition of SI base units draws 265 Wikipedia views per month (change category, ranking #97 of 11).[2] It has Wikipedia articles in 18 language editions, a strong signal of global cultural recognition.[10] It is known by 43 alternative names across languages and contexts.[11]

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). redefinition of SI base units. Retrieved October 17, 2026, from https://4ort.xyz/entity/redefinition-of-si-base-units
MLA “redefinition of SI base units.” 4ort.xyz Knowledge Graph, 4ort.xyz, 17 Oct. 2026, https://4ort.xyz/entity/redefinition-of-si-base-units.
BibTeX @misc{4ortxyz_redefinition-of-si-base-units_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{redefinition of SI base units}}, year = {2026}, url = {https://4ort.xyz/entity/redefinition-of-si-base-units}, note = {Accessed: 2026-10-17}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): redefinition of SI base units — https://4ort.xyz/entity/redefinition-of-si-base-units (retrieved 2026-10-17)

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Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 6w ago · Bouzinac · 2026-09-03 view diff on Wikidata ↗
    Point in time → —
    Significant event → coming into force
    Facet of → International System of Units, SI base unit
    Instance of → change, Wikibase reason for deprecated rank
    + 3 other properties edited (see Wikidata diff for full list)
    "/* wbeditentity-update:0| */ QuickStatements 3.0 [[:toollabs:qs-dev/batch/51866|batch #51866]]"
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