Kaya Identity Calculator

Decompose CO2 emissions with the Kaya identity.

Population (millions)

GDP per capita ($1000)

Energy intensity (MJ/$)

Carbon intensity (g CO2/MJ)

Total CO2 (Mt/yr) 26,400,000

Formula: CO2 = population * GDP/capita * energy/GDP * CO2/energy

Step-by-step with your numbers:

1. Values used:

2. Population = 8,000 millions

3. GDP per capita = 12 $1000

4. Energy intensity = 5 MJ/$

5. Carbon intensity = 55 g CO2/MJ

7. Total CO2 = 26,400,000Mt/yr

Did we solve your problem today?

The Kaya identity breaks total emissions into four driving factors.

The math behind it

CO2 = population x GDP/capita x energy intensity x carbon intensity. Multiply all four to decompose emissions.

Standard world figures give about 37,000 Mt CO2/year.

What does carbon intensity mean?

How much CO2 is emitted per unit of energy consumed.