The metric system is a decimal-based system of measurement used worldwide. It includes units such as meters for length, kilograms for mass, and liters for volume. The system is designed to be simple and consistent, making it easier to convert between units by using powers of ten. For example, 1,000 grams equal 1 kilogram, and 1,000 milliliters equal 1 liter. Adopted by most countries, the metric system is the standard for scientific and technical measurements. It was first established in France during the late 18th century and has since become the preferred system for international trade and communication. The use of the metric system promotes clarity and reduces confusion in measurements.