A cubic decimeter (dm³) and a liter (l) are both units of volume in the SI system (International System of Units) and are in fact exactly the same.

Cubic decimeter

The cubic decimeter is often used in mathematical and scientific contexts. It is defined as the volume of a cube with sides of 1 decimeter (or 10 centimeters) in length.

Liter

A liter, on the other hand, is the unit of volume commonly used in everyday life and commerce. It is defined as the volume of a cube with sides of 10 centimeters in length, which is the same as a cubic decimeter. This makes it easy to remember that 1 liter is equal to 1 dm³.

1 liter = 1 dm³

It is important to note that, although they represent exactly the same volume, the context in which they are used often determines which unit is most appropriate. In general, the unit liter is more frequently used in the food industry, while the cubic decimeter is often used in scientific and industrial contexts.