By Yasmine EDDAM
30 April 2025
In an economy where commercial and industrial exchanges are based on the precision and reliability of measurements, France, like all developed countries, has a strict legal framework governing units of measurement. Although companies are sometimes unfamiliar with these regulations, they are a fundamental part of commercial law, and failure to comply with them can result in penalties. Understanding the obligations relating to units of measurement is therefore essential for any professional who uses measuring instruments in his or her business. The international system of units (SI) in France History and legal foundations The decimal metric system has been compulsory in France since the law of 4 July 1837 on weights and measures. This historic law laid the foundations for a unified system that subsequently evolved into what we know today as the International System of Units (SI). This system was enshrined at the...