The liter (L) is a metric unit of volume defined as the volume of a cube measuring 10 centimeters on each side. It is not an SI base unit but is accepted for use with the SI. The exact definition is 1 L = 1,000 cm³.
The liter was first introduced in France in the late 18th century, specifically in 1795. It was originally defined as the volume of one kilogram of water at 4°C. In 1964, the International System of Units (SI) redefined the liter to better align with metric standards.
Liters are commonly used in daily life for measuring liquids, such as beverages and cooking ingredients. In science and engineering, liters are used in chemistry for measuring solutions and gases. Many countries around the world, especially those using the metric system, utilize liters for various applications, including automotive fuel and medication dosages.