Greenhouse Gas Emissions Calculator

Use this calculator to estimate your household's greenhouse gas emissions from everyday activities. Don't worry if you can't work out the exact numbers - a rough indication is better than nothing. Remember, an average Australian household generates around 14 tonnes of greenhouse gas each year - but a bigger household will be higher.

Household energy
For each energy source, you need to find out how many units of energy you used in the past year.
For electricity and gas, many suppliers include a bar graph on each bill showing how much energy per day you used for each billing period over the past year.
Calculate the amount of energy used in each billing period by multiplying your daily use by the number of days in the billing perioed (usually 60 or 90 days).
You should also be able to get this information by ringing your energy supplier and quoting your details.

Transport
Many people don't know how much fuel they use each year, so you may have to make an estimate.
Several approaches can be used to calculate how many litres of fuel you have used:

• if you know your average weekly amount of money spent on fuel, and the cost per litre, calculate annual litres using: (weekly $)/(cost per litre) x 52
• for a few weeks, record how much fuel you buy each week (in litres) and then estimate annual litres using (number of litres bought)/ number of weeks x 52
• look up www.greenvehicle guide.gov.au to find out your car's fuel consumption: remember most cars use more than the standard test results, but this gives an indication.
  Then calculate annual litres: number of kilometres/100 x fuel consumption (litres/100 km)