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Carbon dioxide emission calculator and offset estimator

 

Carbon dioxide emissions calculator

This carbon dioxide emission calculator will help you gain an approximate idea of how many tons of carbon dioxide some of your activities generate and how many trees it would take to offset those emissions - free to use! 

Calculator usage instructions

Need to convert from metric? 
Click here for handy pop-up converter.

 

Quantity
Total Tons of CO2 annually

Small car
(40 mpg fuel economy)


miles per month

  
Average/medium car
(21 mpg fuel economy)

miles per month

 
SUV/4 wheel drive
(15 mpg fuel economy)

miles per month

 
Electricity usage

kwh/month

 
Natural/propane gas 


cubic feet/month


Fuel oil heating 

gallons per month
 
Air Travel 

miles per month
 
Train Travel 

miles per month
 
General food & waste - how many people in your household?


no. of people


 

How many people in your household have meat in their diet?

no. of people
 

Total annual emissions

tons
Total monthly emissions tons
No. of trees to offset
per year

trees

No. of trees to offset
per month

trees

Notes on CO2 emissions/offset calculator: 

The calculator is not designed to be 100% accurate as there are too many variables required in order to give a reliable emissions total. It is simply to give you an indication on how much carbon dioxide you generate and how many trees it would take to offset those emissions. 

Bear in mind that just about all we do in modern life produces a carbon footprint, well over and above what occurs in the natural world. For instance, the computer you are viewing this on was produced using processes that create carbon emissions.  Offsetting should be seen as a last resort; reduction in consumption is the first line of defense against global warming. 

Unlike many calculators available on the web, I thought I'd let people know how these figures are arrived at in my script. The calculations are based on the following:

1 Source: Sightline Institute
2 Source: Trees for the Future 
3 Source: Various studies from around the world; averaged 
4 Source: Diet, Energy and Global Warming - Gidon Eshel and Pamela Martin. University of Chicago study, May 2006
5,6,7 Source: USA Environmental Protection Agency
8 Source: Livestock's Long Shadow - Food and Agricultural Organization Of The United Nations 2006