Carbon Footprint Calculator
A carbon footprint measures the total greenhouse gas emissions caused by your activities, expressed in kilograms of CO₂ equivalent (kg CO₂-e). The figure accounts for CO₂ plus other gases like methane and nitrous oxide, each weighted by their global warming potential. Australia has one of the highest per-capita emissions in the world, approximately 15–17 tonnes CO₂-e per person per year, driven by electricity from coal, high car usage, and beef consumption. Australia's electricity grid averages around 0.7 kg CO₂-e per kWh (improving with rooftop solar). Transport (petrol and diesel vehicles, flights), diet (beef produces roughly 60 kg CO₂-e per kg of protein), and household waste are the other major categories. The IPCC recommends reducing individual footprints to approximately 2.5 tonnes by 2030 to limit warming to 1.5°C. Enter your usage figures to see your estimated annual footprint.
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Frequently Asked Questions
What is a carbon footprint?
Your carbon footprint is the total amount of greenhouse gases (primarily carbon dioxide, CO\u2082, plus methane, nitrous oxide, and fluorinated gases) produced directly and indirectly by your activities. It's measured in kilograms or tonnes of CO\u2082 equivalent (CO\u2082e). The calculation includes direct emissions from driving, flying, and heating with gas, as well as indirect emissions from electricity generation, purchased goods and services, food production, and waste disposal. Average footprints range from under 2 tonnes per year in lower-income countries to over 15 tonnes per year in high-income countries.
What contributes most to an individual's carbon footprint?
Transport (particularly car travel and air travel), home energy (heating, cooling, and appliances), and food (especially red meat and dairy) typically account for the largest shares. Flying is often the largest single component for frequent flyers: a return flight of approximately 3 hours produces roughly 250-300 kg of CO\u2082 per economy passenger. For someone who flies 4-5 times per year, aviation alone can exceed their entire household energy footprint. A plant-based diet can reduce food-related emissions by 50-70% compared to a meat-heavy diet.
What is a carbon offset?
A carbon offset represents a reduction in CO\u2082 emissions made elsewhere to compensate for emissions you've generated. Offsets fund projects like reforestation, renewable energy development, or direct air capture. One offset credit represents one tonne of CO\u2082 reduced or removed. Not all offsets are equal: high-quality offsets (such as those verified by Gold Standard or Verified Carbon Standard) are rigorously measured and permanent. Cheap offsets may not represent real or permanent emission reductions. Offsetting should be seen as a last resort after reducing your own emissions as much as possible first.
How much CO₂ does a return flight produce?
A return flight of approximately 3 hours (~1,800 km) produces roughly 250-300 kg of CO\u2082 per economy passenger. A return long-haul flight (12+ hours) produces approximately 3-5 tonnes of CO\u2082 per passenger, which exceeds the average person's total annual emissions in some developing nations. Aviation accounts for approximately 2-3% of global CO\u2082 emissions, but its non-CO\u2082 warming effects (contrails, NOx emissions) roughly double its total warming impact on the climate.
What is the average carbon footprint?
The global average carbon footprint is approximately 4 tonnes of CO\u2082 per person per year, though this varies enormously by country. High-income countries like the United States, Canada, Australia, and the UAE are typically 10-20 tonnes per person, while lower-income countries are often under 2 tonnes. To limit global warming to 1.5 degrees Celsius, the global average needs to reach approximately 2 tonnes per person by 2050, requiring fundamental changes to energy, transport, food, and manufacturing systems worldwide.
How can I reduce my carbon footprint quickly?
The highest-impact individual actions include reducing or eliminating flying (one long-haul return flight can equal a year of driving), switching to an electric vehicle or using public transport more, installing rooftop solar with battery storage, shifting to a plant-rich diet (reducing beef and dairy most), improving home insulation and energy efficiency, and reducing consumption of resource-intensive products. Someone who reduces car travel by 50%, eliminates one long-haul flight per year, switches to solar, and reduces meat consumption can reduce their footprint by 5-10 tonnes per year. Small consistent changes compound over time.