Radiocarbon Equations R package rice version 2.2.1 Provides functions for the calibration of radiocarbon dates, as well as options to calculate different radiocarbon-related timescales (cal BP, cal BC/AD, C14 age, F14C, pMC, D14C) and estimating the effects of contamination or local reservoir offsets (Reimer and Reimer 2001 <doi:10.1017/S0033822200038339>). Supporting publication: Blaauw, M., Reimer, P.J., 2026. An open-source toolkit for radiocarbon dating and calibration. Radiocarbon <doi:10.1017/RDC.2026.10221>. The methods follow long-established recommendations such as Stuiver and Polach (1977) <doi:10.1017/S0033822200003672> and Reimer et al. (2004) <doi:10.1017/S0033822200033154>. This package uses the calibration curves from the data package 'rintcal'. Software Depends: R (>= 3.5.0), rintcal (>= 1.4.1) Imports: rlang, ggplot2, maps (>= 3.4.2.1) Suggests: knitr, rmarkdown, utf8, remotes, sf, flextable, rnaturalearthdata, rnaturalearth (>= 1.0.1), audio, tuneR, leaflet, htmltools, CopernicusMarine, testthat (>= 3.0.0) Maarten Blaauw <maarten.blaauw@qub.ac.uk> Comprehensive R Archive Network (CRAN) Maarten Blaauw [aut, cre] (ORCID: <https://orcid.org/0000-0002-5680-1515>), Paula Reimer [ctb] (ORCID: <https://orcid.org/0000-0001-9238-2146>), Vegard Martinsen [ctb] (ORCID: <https://orcid.org/0000-0002-7096-1806>) GPL (>= 2) 2026-07-09 application/tgz https://CRAN.R-project.org/package=rice doi:10.32614/CRAN.package.rice en-GB