# Basic Dimensions

There are six basic dimensions that be used to describe all engineering parameters. Writing parameters in terms of these basic dimensions is an important step in Dimensional Analysis.

All quantities used in engineering can be reduced to six basic dimensions. These dimensions are

Mass M

Length L

Time t

Temperature T

Electric Current I

Luminous Intensity J

All quantities used in fluid dynamics can be written in terms of the top four or M, L, t, T.