NIST-CODATA Internationally Recommended 2022 Values of the Fundamental Physical Constants - SRD 121

This site, developed in the Physics Laboratory at NIST, addresses three topics: fundamental physical constants, the International System of Units (SI), which is the modern metric system, and expressing the uncertainty of measurement results.

Data and Resources

Field Value
accessLevel public
accrualPeriodicity irregular
bureauCode {006:55}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
identifier FDB5909746705200E043065706813E54120
landingPage https://data.nist.gov/od/id/FDB5909746705200E043065706813E54120
language {en}
license https://www.nist.gov/open/license
modified 2014-01-01 00:00:00
programCode {006:052}
publisher National Institute of Standards and Technology
references {http://physics.nist.gov/cuu/Reference/contents.html,http://physics.nist.gov/cuu/Reference/about.html}
resource-type Dataset
source_datajson_identifier true
source_hash b7ad8fb7f3eb42f4ca5fdb9390715fcb995313fbe9eedffa7589f1baa7296070
source_schema_version 1.1
theme {Physics:Magnetics,"Physics:Nuclear physics","Standards:Reference data","Physics:Atomic, molecular, and quantum","Physics:Electron physics"}
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • AmeriGEO
  • AmeriGEOSS
  • CKAN
  • GEO
  • GEOSS
  • National
  • North America
  • United States
  • adopted-values
  • codata
  • constants
  • conversion-factors
  • data-analysis
  • electrical-units
  • energies
  • fundamental-constants
  • fundamental-physical
  • fundamental-physical-constants
  • fundamentals
  • josephson-effects
  • least-squares-adjustments
  • masses
  • nuclear
  • physical-constants
  • quantum-electrodynamics
isopen False
license_id other-license-specified
license_title other-license-specified
maintainer Peter J. Mohr
maintainer_email mohr@nist.gov
metadata_created 2025-09-24T09:27:31.725488
metadata_modified 2025-09-24T09:27:31.725495
notes This site, developed in the Physics Laboratory at NIST, addresses three topics: fundamental physical constants, the International System of Units (SI), which is the modern metric system, and expressing the uncertainty of measurement results.
num_resources 2
num_tags 25
title NIST-CODATA Internationally Recommended 2022 Values of the Fundamental Physical Constants - SRD 121