Formulations of the International Association for the Properties of Water and Steam R package iapws version 1.2 Implementation of some of the formulations for the thermodynamic and transport properties released by the International Association for the Properties of Water and Steam (IAPWS). More specifically, the releases R1-76(2014), R5-85(1994), R6-95(2018), R7-97(2012), R8-97, R9-97, R10-06(2009), R11-24, R12-08, R15-11, R16-17(2018), R17-20 and R18-21 at <https://iapws.org>. Software Depends: R (>= 3.2.2) Jonathan Debove <jondebove@gmail.com> Comprehensive R Archive Network (CRAN) Jonathan Debove [aut, cre] GPL (>= 3) 2025-06-06 application/tgz https://CRAN.R-project.org/package=iapws doi:10.32614/CRAN.package.iapws