Greenhouse Gas Equivalencies Calculator

Convert emissions or energy data into concrete terms you can understand — such as the annual CO₂ emissions of cars, households, and power plants.

The Greenhouse Gas Equivalencies calculator allows you to convert emissions or energy data to the equivalent amount of carbon dioxide (CO₂) emissions from using that amount. The calculator helps you translate 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.

Updated November 2024

These estimates are approximate and should not be used for emission inventories or formal carbon emissions analysis. See Calculations & References for equations and sources used.

Step 1 - Enter and convert data

Select data to convert:

Energy data

Emissions data

Enter data:

Unit	Amount
Gallons of gasoline Gasoline-powered passenger vehicles Kilowatt-hours avoided Kilowatt-hours used MCF of natural gas Therms of natural gas

Enter ZIP Code for regional weighted marginal emission rate (lb/MWh)

Please enter a valid 5-digit zip code so the calculator can estimate emissions avoided using an emissions factor specific to your region. If you don’t enter a ZIP code or you enter an invalid ZIP code, the calculator will use a national average avoided emissions rate, which may not be accurate for your region.

Please enter a valid 5-digit zip code so the calculator can estimate emissions using an emissions factor specific to your region. If you don’t enter a ZIP code or you enter an invalid ZIP code, the calculator will use a national average emissions rate, which may not be accurate for your location.

We could not find your ZIP code in our database. The calculator will use the national weighted marginal emission rate (lb/MWh) value.

* The Equivalencies Calculator uses different emissions factors for electricity depending on whether it is avoided or consumed; at typical scales, energy efficiency and renewable energy programs and projects do not affect baseload power generation, so the calculator uses a non-baseload emissions factor. For electricity consumption, the calculator uses an average emissions factor that includes both baseload and non-baseload generation. Note that the calculator uses national average emissions factors for electricity, which may not be accurate for your region. For more accurate estimates. please use regional emissions factors available in AVERT or eGRID.

Enter data for one or more gases:

Carbon Dioxide or CO₂ Equivalent*

Carbon

CH₄ - Methane

N₂O - Nitrous Oxide

Hydrofluorocarbon gases

Perfluorocarbon gases

Anesthetic gases

SF₆ - Sulfur Hexafluoride

*If your estimated emissions of methane, nitrous oxide, or other non-CO₂ gases are already expressed in CO₂ equivalent or carbon equivalent, please enter your figures in the row for CO₂ or carbon equivalent.