Fonti
Fonti
UnitCloud is a calculation aid. Standards, contracts, medical decisions, engineering approvals and official requirements need original sources.
BIPM SI BrochureSI base units, prefixes and official SI context.NIST Metric SICurrent NIST SI overview after retirement of the historic SI Units site.NIST Metric SI PrefixesDecimal SI prefix names and factors.NIST Binary PrefixesIEC binary prefixes such as KiB, MiB and GiB.NIST Guide to SI Appendix BNIST conversion-factor method and non-SI factors.NIST Guide to SI Appendix B.8Alphabetical conversion factors including pressure and force units.W3C CSS Values and UnitsCSS reference units for px, pt and in contexts.