Kardashev scale

Homo Sapiens, or humans, are a civilization on Earth that are considered Type 0.73 as of 2018.

Physicist and futurist Michio Kaku suggested that, if humans increase their energy consumption at an average rate of 3 percent each year, they may attain Type I status in 100–200 years, Type II status in a few thousand years, and Type III status in 100,000 to a million years.

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 K=(logP-6)/10 where K is a civilization's Kardashev rating and P is the power it consumes, in watts. Using this extrapolation, a Type 0 civilization, not defined by Kardashev, would control about 1 MW of power.

A toe is a "tonne of oil equivalent" which is 42 gigajoules and 1 Mtoe = 11.63 TWh (terawatts per hour).

Humanity's civilization type as of 1973 was about 0.7, using 71.013 Mtoe = 82 588 TWh arriving at an average hourly power consumption of 10 terawatts (TW).

In 2018, the total world energy consumption was 138.649 Mtoe = 161 249 TWh for the year, so the calculation is 161249 / 365 / 24 to get an average hourly power consumption of 18.40 TW. The final calculation is (log 18 400 000 000 000 - 6) / 10 to make 0.73 on Sagan's extended Kardashev scale.