There are 1,000 liters in a cubic meter. A cubic meter consists of a cube with sides that all equal 1 meter in length. A liter is 1 cubic decimeter: a unit of volume with sides all equal to 1/10 of a meter.
The metric system of measurement focuses on multiples of ten, making it very easy to convert from one scale of measurement to another. In metric, volume uses hypothetical cubes measured in meters. A milliliter, the smallest standard metric volume measurement, is equivalent to a cubic centimeter, or a cube of water with sides measuring 1 centimeter each. A liter is 1,000 cubic centimeters (1,000 milliliters). Liters are the most common volume measurement found in countries using the metric system. In most cases, users refer to 1,000 liters of water as a kiloliter rather than a cubic meter.