Kardashev's civilization rating


The Kardashev’s civilization rating is sugested by Carl Sagan from Kardashev scale.

The Kardashev scale is a method of measuring a civilization’s level of technological advancement, based on the amount of energy a civilization is able to use for communication, proposed by Russian astrophysicist Nikolai Kardashev.

The scale has three designated categories:

A Type I civilization—also called a planetary civilization—can use and store all of the energy which reaches its planet from its parent star.
A Type II civilization—also called a stellar civilization—can harness the total energy of its planet’s parent star (the most popular hypothetical concept being the Dyson sphere—a device which would encompass the entire star and transfer its energy to the planet(s)).
A Type III civilization—also called a galactic civilization—can control energy on the scale of its entire host galaxy.

Carl Sagan suggested defining intermediate values (not considered in Kardashev’s original scale) by interpolating and extrapolating the values given above for types I (1016 W), II (1026 W) and III (1036 W), which would produce the formula shown here.

Related formulas


KKardashev's civilization rating (dimensionless)
PPower civilization uses (W)