The International System of Units (SI)
Follow the link below to download the 9th edition of the SI Brochure published by BIPM in 2019.
(www.bipm.org/en/publications/si-brochure/)


SI Units
In order to establish practical units of measurement suitable for every country, weighing and measuring related to normal daily activities (including commerce, health, safety and environment) should be conducted using units of measurement that are defined by common and accurate sizes or amounts. This is an imperative factor in establishing and maintaining a trustworthy society.

For this reason, SI units have been adopted as common international standards to define practical and trustworthy units of quantity, including length (m), mass (kg), time (s), temperature (K), luminance (cd), electric current (A), and amount of substance (mol). Most countries have enacted legislation to officially adopt SI units as the units to be used in determining national measurement standards.

The Republic of Korea adopted SI units as legal units in the Framework Act on National Standards (Article 9 to 12), and Article 12, Paragraph 2 of the Enforcement Decree of the Act stipulates that “National calibration laboratories shall conduct calibration of the measuring instrument that belongs to and is being used by businesses and research institutes. The calibration shall maintain traceability with national measurement standards.”