The Kardashev scale is defined by the expression:

$K\left(P\right)=\frac{\log P - 6}{10}$

where P is the power generated by the civilization expressed in Watts. For planetary civilizations P=10¹⁶ W, K(P)=1 (e.g. Type I).  For stellar civilizations  P=10²⁶W, K(P)=2 (e.g. Type II).  For galactic civilizations P=10³⁶ W, K(P)=3 (e.g. Type III).  Earth is currently at K(P)~0.7, lower than the threshold for Type I.

Another useful scale is the power available to the individual.  For example, we can set:

$K_I\left(P\right)=K\left(P\right)-\frac{\log I}{10}$

where I is the number of individuals in the civilization.  If we assume that a Type I civilization has a population of 10 billion individuals, K_I(P)=0. In essence, we see that there is a MW of power per individual for a Type I civlization that has approximately Earth’s population.