Convert Quintal to Slug

The term quintal comes from the Latin word "centum", meaning "hundred," and historically referred to a weight of around 100 kilograms. It was used in medieval Europe for measuring bulk commodities like grain, and the weight of the quintal varied by region and commodity. Over time, the quintal became standardized to 100 kilograms in most countries that adopted the metric system in the 19th and 20th centuries. It continues to be used in international trade and agriculture, especially in countries like India, Brazil, and some European countries.

The slug was introduced in the late 19th century as part of the foot-pound-second (FPS) system, which was developed to be more consistent with the principles of mechanics, particularly Newton's second law of motion. The term "slug" was chosen because it represented a unit of mass that would help express the relationship between force, mass, and acceleration in a way that was easier to apply in engineering and scientific calculations. The slug is used primarily in the U.S. and some engineering contexts, but it is less common in everyday measurements, where the pound is typically used for mass and weight.