Carbon dioxide emission 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.
Calculator usage instructions
 Enter the appropriate figures into the quantity column  all fields are optional.
 The number of tons of CO2 will be displayed in the other column.
 At the bottom of the form, the total amount of carbon dioxide emissions will be displayed as an
annual and monthly figure and also the number of trees needed to offset. Explanatory notes are below.
Notes on CO2 emissions 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.
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.
The calculations are based on the following:
 Household electricity is based on a figure of 0.68 kilograms of carbon emissions per kilowatt hour
generated by a coal fired power station.
 Natural gas emissions calculated on 0.054 kilograms of carbon dioxide per cubic foot.
 Fuel oil based on 10.11 kilograms CO2 emissions per gallon.
 Small car emissions calculated on 0.26 kilograms emissions per passenger, per mile.
 Medium car emissions calculations based on pounds of carbon dioxide emissions per mile.
 SUV/4 wheel drive carbon dioxide emissions based on pounds per mile.
 Air travel emissions based on Boeing 747 at average capacity and calculated per person.
 Train travel calculations based on average occupancy of intercity train.
 Tree calculation is based on an average tree removing 149 kilograms of carbon dioxide annually.
Note that the tree may take many years to grow to achieve this rate and is dependent upon species. I've
also factored in a 25% mortality/productivity rate; i.e. that 25% of trees planted won't reach the age to
process this amount of carbon dioxide or be compromised in some way so that they only process 75% of that amount.
 General waste is based on the average carbon dioxide emission equivalent of 458 kilograms
per person per year. If your household recycles glass, paper, plastic and cans; only enter in half
the number of people in your household for a more accurate figure.
