The most commonly used derived unit is the millilitre, defined as one-thousandth of a litre, and also often referred to by the SI derived unit name "cubic centimetre". It is a commonly used measure, especially in medicine, cooking and automotive engineering.

A milliliter is a measurement used in the metric system. The metric system is a system of measurement that uses the liter as the basis for measuring capacity. A milliliter is a unit used to measure capacity. It's equal to one-thousandth of a liter. In other words, 1,000 milliliters could fit inside a one-liter container.