The unit is known as the definite magnitude of a physical quantity.
The physical quantities can be measured by utilizing various units depending upon the quantities.
For example, the weight of the rice, sugar, wheat, etc. can be calculated by utilizing kilograms, grams, tons, etc.
A set of fundamental units is a set of units of measurement for physical quantities from which every other unit can be generated.
A system of weights as well as measures based on the principle that each, as well as every quantity, should’ve one unit whose multiples as we will as submultiples are all derived by multiplying or dividing by powers of ten.
The standard unit is also called the metric system.
Hence, the standard unit of volume is a cubic meter or .
One cubic meter can be converted to several other submultiple units of volume like cubic centimeter , cubic milimeter , litre , cubic kilometer , etc.