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dalton

unit of mass defined as ¹⁄₁₂ of the mass of a carbon-12 atom
Intangible unit_of_mass Q483261
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Summary

dalton is an unit of mass[1]. dalton ranks in the top 7% of unit of mass entities by monthly Wikipedia readership (5,986 views/month).[2]

Key Facts

  • Instance of: SI-accepted non-SI unit[3], non-SI unit mentioned in and accepted with the SI[4]
  • Measured physical quantity: atomic mass[5]
  • Named after: John Dalton[6]
  • Said to be the same as: unified atomic mass constant[7]
  • Described at URL: https://www.biologyonline.com/dictionary/unified-atomic-mass-unit[8]
  • Described by source: Armenian Soviet Encyclopedia[9]
  • Conversion to SI unit: 0.00000000000000000000000000166053906892 kg[10]
  • Wikidata SPARQL query equivalent: wd:Q483261 p:P2370/psn:P2370 [wikibase:quantityAmount ?source; wikibase:quantityUnit ?base]. ?item p:P2370/psn:P2370 [wikibase:quantityAmount ?target; wikibase:quantityUnit ?base]. BIND(?source / ?target as ?value)[11]
  • On focus list of Wikimedia project: Wikipedia:Vital articles/Level/4[12]
  • Unit symbol: Da[13], а.е.м.[14], Да[15], м.а.б.[16], u.a.m.[17], u[18]

Why It Matters

dalton has Wikipedia articles in 28 language editions, a strong signal of global cultural recognition.[19] dalton is known by 132 alternative names across languages and contexts.[20]

Related Entities

John Dalton

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] ↑ . ISO 80000-10:2019 Quantities and units — Part 10: Atomic and nuclear physics. wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.
  7. [9] ↑ . wikidata.org.
  8. [10] ↑ . pml.nist.gov. pml.nist.gov. Provenance: wikidata.org.
  9. [11] ↑ . wikidata.org.
  10. [12] ↑ . wikidata.org.
  11. [13] ↑ . ISO 80000-1:2009 Quantities and units—Part 1: General. wikidata.org.
  12. [14] ↑ . wikidata.org.
  13. [15] ↑ . wikidata.org.
  14. [16] ↑ . wikidata.org.
  15. [17] ↑ . wikidata.org.
  16. [18] ↑ . International Electrotechnical Vocabulary. wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [19] ↑ . Wikidata sitelinks. wikidata.org.
  3. [20] ↑ . 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). dalton. Retrieved October 13, 2026, from https://4ort.xyz/entity/dalton
MLA “dalton.” 4ort.xyz Knowledge Graph, 4ort.xyz, 13 Oct. 2026, https://4ort.xyz/entity/dalton.
BibTeX @misc{4ortxyz_dalton_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{dalton}}, year = {2026}, url = {https://4ort.xyz/entity/dalton}, note = {Accessed: 2026-10-13}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): dalton — https://4ort.xyz/entity/dalton (retrieved 2026-10-13)

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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. 21w ago · O Breixo · 2026-05-15 view diff on Wikidata ↗
    Unit symbol → {'lang': 'en', 'text': 'Da'}, {'lang': 'ru', 'text': 'а.е.м.'}, {'lang': 'ru', 'text': 'Да'} +7
    "/* wbsetclaim-create:2||1 */ Unit symbol: Da"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.