The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most …

国际单位制（法语：Système International d'Unités 符号：SI），源自公制或米制，旧称“万国公制”，是现时世界上最普遍采用的标准 度量衡 单位系统，采用 十进制 进位系统。 是 18世纪 末 …

國際單位制 （法語： Système International d'Unités，簡稱 SI），源於 公制 （又稱米制），是世界上最普遍採用的標準 度量 系統。 國際單位制以七個 基本單位 為基礎，由此建立起一系列 …

2025年3月26日 · International System of Units (SI), international decimal system of weights and measures derived from and extending the metric system of units. Adopted by the 11th General …

Base SI Units Base (or basic) units, are the fundamental units of SI. There are seven base units, which are listed in Table 1.4.1 1.4. 1, Chemistry uses five of the base units: the mole for …

The recommended practical system of units of measurement is the International System of Units (Système International d'Unités), with the international abbreviation SI. From 20 May 2019 all …

The SI system (International System of Units) is the modern metric system of measurement and the dominant system of international commerce and trade. SI units are gradually replacing …

The International System of Units, or SI (from its French name, “Système international d'unités”), is a system of measurement units, based on the International System of Quantities (ISQ), …

The International System of Units, abbreviated SI (from the original French Système International) is a global standard used to express the magnitudes or quantities of natural phenomena.

Our unit conversion calculators allow you to convert to and from the SI units of measure and other measurement systems, such as US Customary or CGS units. The International System of …