There are 1,000 milliliters in a liter. A liter is defined as the volume of a cube with sides that are 10 centimeters long. A liter is roughly 1.057 U.S. quarts and 0.264 of a U.S. gallon.
The abbreviation for milliliters is ml or mL. MathisFun.com explains that 20 drops of water makes about 1 milliliter, while one teaspoon holds approximately 5 milliliters. A liter of pure water has a mass of 1 kilogram at 4 degrees Celsius. Water at both warmer and colder temperatures is less dense. Products like milk, soda and gas are often sold by the liter.