constants: Reference on Constants, Units and Uncertainty

CODATA internationally recommended values of the fundamental physical constants, provided as symbols for direct use within the R language. Optionally, the values with uncertainties and/or units are also provided if the 'errors', 'units' and/or 'quantities' packages are installed. The Committee on Data for Science and Technology (CODATA) is an interdisciplinary committee of the International Council for Science which periodically provides the internationally accepted set of values of the fundamental physical constants. This package contains the "2018 CODATA" version, published on May 2019: Eite Tiesinga, Peter J. Mohr, David B. Newell, and Barry N. Taylor (2020) <>.

Version: 1.0.1
Depends: R (≥ 3.5.0)
Suggests: errors (≥ 0.3.6), units, quantities, testthat
Published: 2021-02-25
DOI: 10.32614/CRAN.package.constants
Author: Iñaki Ucar ORCID iD [aut, cph, cre]
Maintainer: Iñaki Ucar <iucar at>
License: MIT + file LICENSE
NeedsCompilation: no
Materials: README NEWS
In views: ChemPhys
CRAN checks: constants results


Reference manual: constants.pdf


Package source: constants_1.0.1.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): constants_1.0.1.tgz, r-oldrel (arm64): constants_1.0.1.tgz, r-release (x86_64): constants_1.0.1.tgz, r-oldrel (x86_64): constants_1.0.1.tgz
Old sources: constants archive


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