What is the modern, formal designation for the standardized form of the metric system used globally today?

The International System of Units (SI)

The metric system has undergone significant refinement since its inception in France, driven by advances in metrology throughout the 19th and 20th centuries demanding greater precision. This evolution culminated in the development and international acceptance of the modern standard, formally known as the International System of Units, or SI. This system moves definitions entirely away from terrestrial artifacts, anchoring base units to fundamental constants of nature. The transition to SI required extensive international cooperation, formalized through bodies like the General Conference on Weights and Measures (CGPM), to ensure absolute congruence—meaning a measurement taken anywhere in the world yields the identical result—a prerequisite for modern globalized high-tech manufacturing and communication.