Liter (L)
The liter (L) is a metric unit of volume, representing 1,000 milliliters. It originated in France as part of the metric system reforms of 1795, initially defined as the volume occupied by one kilogram of water at its densest point. Over time, the liter became a fundamental unit for measuring liquids in science, industry, and everyday life. Its decimal structure makes calculations and conversions straightforward, contributing to its widespread adoption around the world, even as some regions continue to use imperial measures in certain contexts.
Cup (US)
The US cup is a customary volume unit equal to 8 fluid ounces or about 236.588 milliliters. Originating from practical kitchen measures, it has become a standard in American recipes, baking, and beverage portions. The cup facilitates straightforward scaling in recipes and is widely recognized in cookbooks, culinary schools, and food packaging.