How does your carbon footprint compare?
Most people in high-emission countries significantly underestimate their personal carbon footprint. The biggest blind spots are not the things most people focus on. Fill in the four sections to see where you sit.
Querying population data…
How much of it is the commute?
Years of waking life lost to commuting plus the carbon cost.
What is the average carbon footprint per person in the US?
The average American produces approximately 16 tonnes of CO2 equivalent (CO2e) per year, according to the EPA and Our World in Data analysis of 2023 emissions data. This is roughly 3.4 times the global average of 4.7 tonnes per person and nearly seven times the Paris Agreement-aligned target of 2.3 tonnes per person by 2030. The US figure is consistently among the highest per-capita rates of any major economy, though it has declined from its peak of approximately 24 tonnes in the late 1990s.
The high US average is driven by several structural factors rather than purely individual choices. Car-dependent infrastructure means the average American drives over 13,000 miles per year — most US residents have no practical alternative to driving for most trips. Homes are significantly larger on average than in peer countries, requiring more energy to heat and cool. The electricity grid, while increasingly incorporating renewables, still relies substantially on natural gas. Per-capita meat consumption, particularly beef, is among the highest in the world. And the consumption of imported goods generates substantial embedded emissions that partly show up in exporting countries' figures rather than the US total.
Within the US, individual footprints vary enormously. A car-free urban resident in a mild climate using renewable electricity and a plant-based diet might have a footprint of 4-6 tonnes — comparable to the European average. A suburban homeowner who drives an SUV, flies frequently, and eats meat daily may exceed 30 tonnes. The average UK carbon footprint is approximately 5.2 tonnes per person, significantly lower than the US despite a similar standard of living, primarily due to smaller homes, shorter driving distances, a cleaner electricity grid (approximately 40% renewable as of 2024), and lower meat consumption.
Carbon footprint of a flight: how much does flying actually cost the planet?
Aviation is one of the most emissions-intensive activities available to individuals, and the impact varies dramatically by journey length. A short-haul return flight (London to Paris or New York to Boston) produces approximately 0.25 tonnes CO2e per passenger. A transatlantic return flight in economy class — London to New York — produces approximately 1.6 tonnes CO2e per passenger, equivalent to more than 30% of the average UK annual footprint in a single trip. A return flight from the UK to Australia produces approximately 4.5 tonnes CO2e per passenger, which would exceed the entire UK average in a single journey.
Business and first class seats have significantly higher per-passenger footprints because they occupy more physical space on the aircraft, meaning a smaller number of passengers share the same total flight emissions. A business class transatlantic flight can produce 4-5x the emissions of the equivalent economy seat. This multiplier is important context when high-income travellers compare their annual footprint to national averages.
The radiative forcing effect of aviation adds an additional layer of complexity. Emissions released at cruising altitude by aircraft engines — including water vapour, nitrogen oxides, and contrail formation — may have a warming effect 1.5-2x greater than the CO2 alone. Most carbon calculators use CO2-only figures; if radiative forcing is included, the transatlantic return flight would be approximately 2.5-3 tonnes CO2e equivalent. Aviation represents approximately 2.5% of global CO2 emissions but potentially 3.5-4% of total warming contribution when non-CO2 effects are included (Lee et al., 2021).
What is a carbon rating?
A carbon rating is a standardised label or score that communicates the greenhouse gas emissions associated with a product, building, or activity. The term is used in several distinct contexts. For homes and buildings in the UK, Energy Performance Certificates (EPCs) provide a carbon emissions rating (A through G) alongside the energy efficiency rating. The EPC carbon rating estimates the property's CO2 emissions per square metre per year at standard occupancy, allowing comparison across homes of different sizes and types.
For consumer products, carbon ratings are increasingly applied to food (some supermarkets in the UK and Europe have begun labelling food products with carbon footprint per 100g or per serving), transportation (official EU CO2 ratings for passenger cars measured in grams of CO2 per kilometre), and financial products (some investment funds and pension providers now publish portfolio carbon intensity metrics). The methodology for calculating carbon ratings varies significantly between schemes, making direct comparisons across different rating systems unreliable.
In the context of personal carbon footprint calculators like this one, the "rating" is your total annual CO2e output compared to national averages and climate targets. The most widely used international reference points are the global average (4.7 tonnes), the Paris Agreement-aligned target for 2030 (2.3 tonnes), and the per-capita average of your country. Scoring below 4.7 tonnes places your personal contribution below the global average; reaching 2.3 tonnes or below would meet the 2030 Paris alignment target if adopted universally.
Understanding your carbon footprint
The US average is 16 tonnes CO2e per person per year, approximately 3.4 times the global average of 4.7 tonnes (Our World in Data, 2023). The Paris Agreement implies a per-capita budget of approximately 2.3 tonnes by 2030. No moralising, no guilt-tripping: this calculator shows where you sit relative to others and the targets.
The most impactful individual actions are living car-free (saves 2.4 tonnes), avoiding a transatlantic flight (saves 1.6 tonnes), eating plant-based (saves 0.8–1.5 tonnes), and switching to renewable energy (saves 1.5 tonnes). Recycling and switching off lights, while worthwhile, save approximately 0.2 tonnes each.
Frequently asked questions
The average American produces approximately 16 tonnes of CO2e per year (EPA/Our World in Data). This is roughly 3.4 times the global average of 4.7 tonnes and nearly 7 times the Paris-aligned target of 2.3 tonnes. A car-free vegan in a mild climate might have 4–6 tonnes; a frequent-flying suburban homeowner might exceed 30 tonnes.
A short-haul return flight (e.g., London to Paris) produces approximately 0.25 tonnes CO2e per passenger. A transatlantic return flight produces approximately 1.6 tonnes CO2e per passenger in economy class. A return flight to Australia from the UK produces approximately 4.5 tonnes, nearly the entire UK average in a single trip.
Yes. Poore and Nemecek's 2018 study in Science found food systems account for 26% of global greenhouse gas emissions. Beef generates approximately 60 kg CO2e per kg of beef produced. Switching from a high-meat diet to vegan saves approximately 1.5–2.3 tonnes per year. Even reducing meat to 2–3 times per week saves approximately 0.8–1.0 tonnes.
The Paris Agreement implies a per-capita global carbon budget of approximately 2.3 tonnes CO2e per year by 2030. This would require the average American to reduce their footprint by roughly 86% from current levels. The UK target is net zero by 2050, implying gradual reductions from 5.2 tonnes to near zero over 25 years.
For most Americans, the highest-impact action depends on current lifestyle. Wynes and Nicholas (2017) ranked individual actions by impact: living car-free saves approximately 2.4 tonnes per year, avoiding one transatlantic flight saves 1.6 tonnes, eating plant-based saves 0.8 tonnes, and buying green energy saves 1.5 tonnes. Recycling, while worthwhile, saves approximately 0.2 tonnes, far less than most people assume.
The average UK resident produces approximately 5.2 tonnes of CO2e per year, significantly lower than the US figure. Smaller homes, shorter driving distances, and a cleaner electricity grid (around 40% renewable as of 2024) all contribute. However, this figure excludes consumption-based emissions from imported goods, which would add approximately 2 to 3 tonnes if included.
Carbon offsets vary enormously in quality. High-quality offsets verified by Gold Standard or Verra VCS using permanent removal methods can be legitimate. However, a 2023 Guardian investigation found that over 90% of Verra's rainforest offset credits did not represent genuine carbon reductions. The scientific consensus is that offsets should be a last resort after reducing actual emissions, not a substitute for reduction.
This is genuinely debated. Critics argue that 100 companies are responsible for 71% of global industrial emissions (Carbon Disclosure Project, 2017), and systemic change through policy and corporate action is far more impactful than individual behaviour change. Proponents argue that individual awareness drives political will and consumer demand for low-carbon products. Both positions have merit: individual action alone is insufficient, but collective individual action creates conditions for systemic change.
Yes, substantially. Poore and Nemecek's 2018 study in Science — the largest-ever meta-analysis of food's environmental impact, covering 38,700 farms and 1,600 food processors — found that food systems account for 26% of global greenhouse gas emissions. Beef and dairy are the largest individual contributors: producing 1 kg of beef generates approximately 60 kg CO2e, compared to 3 kg for tofu and 0.4 kg for nuts. Switching from a high-meat diet (US average) to a vegan diet saves approximately 1.5-2.3 tonnes CO2e per year — a reduction equivalent to eliminating a transatlantic return flight. Even reducing meat to 2-3 times per week saves approximately 0.8-1.0 tonnes per year. Food waste also matters: approximately 30-40% of food produced in the US is wasted, and decomposing food in landfills produces methane, which has a warming potential approximately 28 times higher than CO2 over a 100-year period.
Wynes and Nicholas's 2017 study in Environmental Research Letters identified the individual actions with the largest quantified carbon impact. The highest-impact actions are: having one fewer child (estimated 58.6 tonnes CO2e per year reduction — though this is debated as it uses lifetime attribution methodology), living car-free (approximately 2.4 tonnes per year), avoiding one transatlantic return flight per year (approximately 1.6 tonnes), and switching to a plant-based diet (approximately 0.8-1.6 tonnes per year). Switching to a fully electric vehicle powered by renewable energy saves approximately 1.5-2 tonnes per year. Changing energy tariff to a renewable provider saves approximately 1.0-1.5 tonnes if you previously used gas heating and grid electricity. By contrast, recycling (approximately 0.21 tonnes) and using low-energy lightbulbs (approximately 0.10 tonnes) are meaningful but an order of magnitude smaller than the highest-impact actions. The biggest lever most individuals have is transport, specifically whether they fly frequently and whether they drive a fossil-fuel vehicle.
The Paris Agreement aims to limit global warming to 1.5°C above pre-industrial levels, which requires global net-zero CO2 emissions by approximately 2050. For an equal per-capita allocation of the remaining carbon budget, the global average footprint needs to fall from approximately 4.7 tonnes today to approximately 2.3 tonnes per person by 2030 and near zero by 2050. This is a dramatic reduction: the average American at 16 tonnes per year would need to cut approximately 86% of their current footprint by 2030 on this allocation. In practice, the reductions are expected to come from a combination of systemic changes (energy grid decarbonisation, EV transition, industrial processes) and individual behaviour change. The 2.3-tonne figure is a useful personal benchmark even though meeting it individually while societal systems remain unchanged is extremely difficult — it contextualises how far current consumption levels are from the Paris-aligned target.
- US EPA. Greenhouse Gas Equivalencies Calculator. epa.gov
- Our World in Data (2023). CO2 and Greenhouse Gas Emissions. Per-capita by country.
- Wynes S, Nicholas KA (2017). The climate mitigation gap. Environmental Research Letters, 12(7).
- Poore J, Nemecek T (2018). Reducing food's environmental impacts. Science, 360(6392).
- UK DESNZ (2024). Government GHG Conversion Factors for Company Reporting.