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International Prototype of the Kilogram

physical artifact that formerly defined the kilogram unit of mass
Place artificial_physical_object Q3738063
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Summary

International Prototype of the Kilogram is an artificial physical object[1]. It draws 721 Wikipedia views per month (artificial_physical_object category, ranking #1 of 5).[2]

Key Facts

  • International Prototype of the Kilogram's instance of is recorded as artificial physical object[3].
  • International Prototype of the Kilogram's instance of is recorded as material measure[4].
  • International Prototype of the Kilogram's instance of is recorded as weight[5].
  • International Prototype of the Kilogram's commissioned by is recorded as General Conference on Weights and Measure[6].
  • International Prototype of the Kilogram's maintained by is recorded as International Bureau of Weights and Measures[7].
  • International Prototype of the Kilogram's manufacturer is recorded as Johnson Matthey[8].
  • International Prototype of the Kilogram is made of platinum[9].
  • International Prototype of the Kilogram is made of iridium[10].
  • International Prototype of the Kilogram is made of platinum-iridium alloy[11].
  • International Prototype of the Kilogram took place at Pavillon de Breteuil[12].
  • International Prototype of the Kilogram is used for primary standard[13].
  • International Prototype of the Kilogram's Commons category is recorded as International prototype of the kilogram[14].
  • 1799 marks the founding of International Prototype of the Kilogram[15].
  • 1879 marks the founding of International Prototype of the Kilogram[16].
  • 1889 marks the founding of International Prototype of the Kilogram[17].
  • International Prototype of the Kilogram's significant event is recorded as ratification[18].
  • International Prototype of the Kilogram's significant event is recorded as verification[19].
  • International Prototype of the Kilogram's significant event is recorded as verification[20].
  • International Prototype of the Kilogram's significant event is recorded as verification[21].
  • International Prototype of the Kilogram's significant event is recorded as deprecation[22].
  • International Prototype of the Kilogram's authority is recorded as Metre Convention[23].
  • International Prototype of the Kilogram's official website is recorded as https://www.bipm.org/en/bipm/mass/ipk/[24].
  • International Prototype of the Kilogram's shape is recorded as right circular cylinder[25].
  • International Prototype of the Kilogram's official name is recorded as Prototype international du kilogramme[26].
  • International Prototype of the Kilogram's official name is recorded as International Prototype of the Kilogram[27].

Body

Designation and Status

Recorded instance of include artificial physical object[3], material measure[4], and weight[5].

History and Context

Recorded inception include 1799[15], 1879[16], and 1889[17].

Why It Matters

International Prototype of the Kilogram draws 721 Wikipedia views per month (artificial_physical_object category, ranking #1 of 5).[2] It has Wikipedia articles in 7 language editions, a strong signal of global cultural recognition.[28] It is known by 18 alternative names across languages and contexts.[29]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . wikidata.org.
  17. [19] ↑ . wikidata.org.
  18. [20] ↑ . wikidata.org.
  19. [21] ↑ . wikidata.org.
  20. [22] ↑ . wikidata.org.
  21. [23] ↑ . wikidata.org.
  22. [24] ↑ . wikidata.org.
  23. [25] ↑ . wikidata.org.
  24. [26] ↑ . wikidata.org.
  25. [27] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [28] ↑ . Wikidata sitelinks. wikidata.org.
  3. [29] ↑ . Wikidata aliases. wikidata.org.

📑 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). International Prototype of the Kilogram. Retrieved October 18, 2026, from https://4ort.xyz/entity/international-prototype-of-the-kilogram
MLA “International Prototype of the Kilogram.” 4ort.xyz Knowledge Graph, 4ort.xyz, 18 Oct. 2026, https://4ort.xyz/entity/international-prototype-of-the-kilogram.
BibTeX @misc{4ortxyz_international-prototype-of-the-kilogram_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{International Prototype of the Kilogram}}, year = {2026}, url = {https://4ort.xyz/entity/international-prototype-of-the-kilogram}, note = {Accessed: 2026-10-18}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): International Prototype of the Kilogram — https://4ort.xyz/entity/international-prototype-of-the-kilogram (retrieved 2026-10-18)

Canonical URL: https://4ort.xyz/entity/international-prototype-of-the-kilogram · Last refreshed:

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 · عُثمان · 2026-09-10 view diff on Wikidata ↗
    Mass → {'amount': '+1'}
    Official website → https://www.bipm.org/en/bipm/mass/ipk/
    Wurvoc.org measure id → international_prototype_of_the_kilogram
    Significant event → ratification, verification, verification +2
    + 22 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaim-create:1||1 */ Wurvoc.org measure id: international_prototype_of_the_kilogram, Matched to [[:toollabs:mix-n-match/#/entry/14008232|international prototype of the kilogram (#14008232)]] i"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.