# Fundamental quantities

The quantities which are independent of all other quantities and do not require the help of any other physical quantity for their definition are called fundamental quantities. These are also called absolute quantities as all other quantities are based upon and can be expressed in terms of these quantities.

# Derived quantities

The physical quantities which can be derived by suitable multiplication or division of different powers of fundamental quantities are called derived quantities.

If length is defined as a fundamental quantity, then area and volume are derived from length and are expressed in term of length with power 2 and 3 over the term of length, respectively.