Imperiaalijärjestelmänä

Imperiaalijärjestelmänä refers to the imperial system of units, a system of weights and measures historically used in the British Empire and still in use in the United States, and to a lesser extent in some Commonwealth nations. It is a descendant of the English units, which evolved from ancient Roman units and traditional English measurements. The imperial system is a non-metric system, meaning it does not follow the base-ten structure of units like meters and kilograms.

Key units within the imperial system include the inch, foot, yard, and mile for length; the ounce, pound, and ton for mass; and the fluid ounce, pint, quart, and gallon for volume. The system is characterized by its varied conversion factors, such as 12 inches in a foot and 3 feet in a yard, which can make calculations more complex compared to the metric system. While officially replaced by the metric system in the United Kingdom in the late 20th century, many imperial units remain in common use for everyday purposes, like road distances measured in miles and body weight in pounds. The United States is the primary country that continues to use the imperial system as its de facto standard for most commercial, industrial, and everyday applications.