The International System of Units (SI) in Jamaica refers to the officially recognised system of measurement used for scientific, technical, commercial, and administrative purposes. Based on globally standardised units such as the metre, kilogram, and second, SI provides a coherent framework for quantifying physical properties, ensuring consistency, accuracy, and comparability across sectors. In Jamaica, SI forms the legal and institutional foundation of measurement, even as historical and customary units continue to coexist in everyday practice.
The adoption of SI in Jamaica reflects both its integration into the international community and its transition from a colonial system rooted in British imperial units toward a modern, globally aligned standard. This shift has had significant implications for engineering, trade, land administration, education, and national development.
