Standards Index · NIST

NIST SP 330:2019

The International System of Units (SI)

OFFICIAL SOURCE ↗ FIND MENTIONS IN THE ATLAS

Status: Current
Publisher: NIST
Year: 2019
Discipline: Standards & Units

What it covers

The US edition of the SI Brochure reflecting the 2019 redefinition in which all seven base units derive from fixed defining constants. Freely available; the full text is readable in the Atlas document library.

Summary written for this index — consult the official text for normative requirements.

Related standards

ISO 80000-1:2022 Quantities and units — Part 1: General Current OIML D 8:2004 Measurement standards — Choice, recognition, use, conservation and documentation Current NIST SP 811:2008 Guide for the Use of the International System of Units (SI) Current BIPM SI Brochure, 9th edition (2019) The International System of Units (SI) Current