The milliliter (mL) is a metric unit of volume equal to one-thousandth of a liter, widely used in medicine, cooking, and chemistry for measuring small liquid quantities. Cough syrup dosages, perfume bottles, and laboratory reagents are all commonly labeled in milliliters. One milliliter equals exactly one cubic centimeter, making it interchangeable with cm³ in scientific contexts.

The deciliter (dL) is a metric unit of volume equal to one-tenth of a liter, used in medical lab reports and some European recipes. Blood test results in many countries express cholesterol and glucose levels in milligrams per deciliter, making this unit familiar to anyone reviewing health data. One deciliter equals exactly 100 milliliters or roughly 3.381 fluid ounces.