Developed World (2023)
Population (billions): 1.2 billions; GDP per Capita (USD/person): 45,000 USD/person; Energy Intensity (MJ/USD): 0.1 MJ/USD; Carbon Intensity (tCO2/MJ): 0.04 tCO2/MJ
Total CO2 Emissions (GtCO2): 216 GtCO2
Kaya Identity Calculator
Ecology0.0(0)
The Kaya Identity is a mathematical identity that expresses the factors that determine the total emission of carbon dioxide (CO2) into the atmosphere. This calculator helps to assess the human impact on the climate.
More tools:Animal & Pet Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Population (billions), GDP per Capita (USD/person), Energy Intensity (MJ/USD), and Carbon Intensity (tCO2/MJ) in the units shown.
Step 2
Read Total CO2 Emissions (GtCO2) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Developing World (2023)
Population (billions): 6.7 billions; GDP per Capita (USD/person): 5,000 USD/person; Energy Intensity (MJ/USD): 0.2 MJ/USD; Carbon Intensity (tCO2/MJ): 0.06 tCO2/MJ
Total CO2 Emissions (GtCO2): 402 GtCO2
High Carbon Intensity Scenario
Population (billions): 9 billions; GDP per Capita (USD/person): 20,000 USD/person; Energy Intensity (MJ/USD): 0.2 MJ/USD; Carbon Intensity (tCO2/MJ): 0.07 tCO2/MJ
Total CO2 Emissions (GtCO2): 2,520 GtCO2
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