Carbon Footprint Calculator

A project of the Mat-Su Carbon Crew, a Student Group at Matanuska Susistna College

Thank you for caring about your planet!

This carbon dioxide emission calculator will help you gain an approximate idea of how many tons of carbon dioxide some of your activities generate. We encourage you to try and reduce it. We can help!

Calculator instructions

  • Enter the appropriate figures into the quantity column - all fields are optional.
  • The estimated number of tons of CO2 emissions will be displayed in the right hand column.
  • At the bottom of the form, the total estimated amount of carbon dioxide emissions will be displayed as an annual and monthly figure in short tons (1 short ton = 2000 pounds).
  • Below are some great ways to help you reduce your carbon usage.
  • Explanatory notes are below the calculator as to how those figures were obtained.

The Seattle Post-Intelligencer recently did some reasearch about carbon footprint calculators:
While results do vary widely, the calculations used on this site fall near the middle of this distribution.

Online Resources referenced above:


Total Tons of
 CO2 annually

Small car, Snowmachine,
4-wheeler, Motorcycle
(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


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

Total monthly emissions tons

Calculator provided by

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 is generated by your activity.

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, and we are using power.   Offsetting should be seen as a last resort; reduction in consumption is the first goal. 

 The calculations are based on the following:

  • Household electricity is based on a figure of 1.5 pounds of carbon emissions per kilowatt hour generated by a coal fired power station.2 Averages for USA based on Department of Energy figures.
  • Natural gas emissions calculated on 0.12 pounds of carbon dioxide per cubic foot.4

  • Fuel oil based on 22.29 pounds CO2 emissions per gallon.4
  • Small car emissions calculated on .59 pounds emissions per passenger, per mile1
  • Medium car emissions calculations based on 1.1 pounds of carbon dioxide emissions per mile1
  • SUV/4 wheel drive carbon dioxide emissions based on 1.57 pounds per mile1
  • Air travel emissions based on Boeing 747 at average USA capacity and calculated per person1
  • Train travel calculations based on average occupancy of intercity train.1
  • General waste is based on the USA average4 carbon dioxide emission equivalent of 1010 pounds per person per year. Please note, if your household recycles all glass, paper, plastic and cans; this aspect of the calculation could be as much as 50% less. The food aspect of the calculation is based on a vegan diet; i.e being 1.5 tons per person less than the American average of 5,600 pounds of CO2 equivalent emissions per year7.
  • Based on the average American diet generating the equivalent of 1.5 tons more carbon dioxide per year than a vegan diet.3

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