4 Great Carbon Calculators

By: 3Degrees

Interested in determining the climate impact of your energy use, but not sure how?

3Degrees previously hosted a carbon calculator on its website to help people measure the greenhouse gas emissions associated with their energy use. Since we are not currently selling Renewable Energy Certificates (RECs) or verified carbon offsets to individuals directly, this calculator has been taken down, at least for now.

However, there are still a number of carbon calculators out there. Four of our favorites are listed below.

The Environmental Protection Agency’s Household Emissions Calculator

  • The EPA’s online calculator allows you to determine your household’s greenhouse gas emissions.
  • Their website also provides suggestions on actions you can take to reduce your emissions.

Entergy’s “Make an Impact” Carbon Emissions Calculator

  • Developed in conjunction with the Center for Climate and Energy Solutions (formally the Pew Center on Global Climate Change), this calculator can provide you with a quick and easy or advanced and detailed estimation of your carbon footprint.
  • And, if you want to balance out your greenhouse gas emissions after using this calculator, you can purchase carbon offsets through Entergy’s Double Your Difference program, which will match your purchase by retiring up to five tons of carbon offsets themselves – even if you are not an Entergy customer!
  • 3Degrees helped Entergy build the Double Your Difference website, and sources carbon offsets for their program from projects like the Denton Landfill.

The Nature Conservancy Carbon Footprint Calculator

  • The Nature Conservancy, a conservation organization and 3Degrees partner, hosts a calculator on its website that allows you to calculate both your personal greenhouse gas emissions, as well as those of your entire household.

Safe Climate Carbon Footprint Calculator

  • A project of the World Resources Institute, a global environmental think tank, this calculator can be used by individuals outside of the U.S. and Canada.

The list above is just a partial list of the carbon calculators available on the web, and of course, it would be difficult to list them all. But if you have a suggestion for a credible, unique calculator that we should add to this list, let us know.

And if you are a business, non-profit or government agency interested in supporting renewable energy and mitigating the impact of its unavoidable carbon emissions, feel free to contact us. We can help you learn how Renewable Energy Certificates (RECs) and carbon offsets can enable your organization to be 100% green powered and carbon balanced.


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