About This Calculator
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Last Updated: March 2021
Did you ever wonder what reducing carbon dioxide (CO2) emissions by 1 million metric tons means in everyday terms? The greenhouse gas equivalencies calculator can help you understand just that, translating abstract measurements into concrete terms you can understand, such as the annual emissions from cars, households, or power plants.
This calculator may be useful in communicating your greenhouse gas reduction strategy, reduction targets, or other initiatives aimed at reducing greenhouse gas emissions.
Please note that these estimates are approximate and intended for communication purposes. They should not be used for emission inventories, formal carbon footprints, or formal emissions analysis. See Other Resources for additional tools that EPA maintains for emissions analysis and Other Calculators for additional calculators that EPA maintains.
Enter Your Data
There are two options for entering data into this calculator to develop greenhouse gas equivalencies. When you enter energy data, the calculator converts your entered values to carbon dioxide-equivalent greenhouse gas emissions based on emission factors for energy consumption or electricity reductions. It then displays equivalent ways to express those emissions. When you enter emissions data, the calculator displays equivalent ways to express those emissions. For additional information, see the equations and sources used for this calculator on the Calculations and References page.