Ecology

Carbon Footprint Calculator

Estimate your annual CO2 emissions from energy, transportation, and flights

Quick Answer:The average American produces approximately 16 tonnes of CO2 annually in 2026. A household using 900 kWh/month electricity, 50 therms gas, driving 12,000 miles, with 3 flights produces roughly 12.5 tonnes.

Your Usage

Monthly Electricity (kWh)

Monthly Gas (therms)

Annual Miles Driven

Short Flights/year

Long Flights/year

Annual CO2 Emissions

Calculating... tonnes CO2/year

vs US Average (16t)

vs World Average (4.7t)

Largest Source

Trees to Offset

Emissions Breakdown

Electricity--

Natural Gas--

Driving--

Flights--

Expert Insight 2026 Pro Tip

Transportation is the largest emissions source for most Americans, accounting for nearly 29% of total US greenhouse gas emissions. Switching to an electric vehicle can reduce your driving emissions by 50-70%, even when accounting for grid electricity. Home energy improvements like upgrading insulation and switching to a heat pump can cut heating emissions by up to 40%. If you fly frequently, consider that a single transatlantic flight can equal months of driving emissions -- reducing just one long-haul flight per year saves nearly 1.8 tonnes of CO2.

Frequently Asked Questions

What is the average carbon footprint per person in the US?

The average American produces approximately 16 tonnes of CO2 equivalent per year, which is significantly higher than the global average of around 4.7 tonnes. This includes emissions from electricity, heating, transportation, food production, and consumer goods. Reducing your carbon footprint involves targeting the largest sources first, which for most Americans means driving and home energy use. By switching to renewable energy, driving an EV or hybrid, and reducing air travel, many households can cut their footprint by 30-50% within a single year.

How many trees does it take to offset one tonne of CO2?

A single mature tree absorbs approximately 22 kilograms of CO2 per year, meaning you would need roughly 45 mature trees to offset one tonne of CO2 annually. However, young trees absorb less carbon in their early years, so the actual number depends on tree species, age, and growing conditions. Tropical hardwoods and fast-growing species like eucalyptus tend to absorb more carbon than slow-growing deciduous trees. Planting trees is an excellent long-term strategy, but immediate emission reductions through energy efficiency and transportation changes are more impactful in the short term for combating climate change.

How do flights compare to driving in terms of carbon emissions?

A single long-haul round-trip flight produces approximately 1.8 tonnes of CO2 per passenger, which is equivalent to driving roughly 4,450 miles in an average car. Short-haul flights produce around 0.255 tonnes per trip. While flying is faster, it generates significantly more emissions per mile than driving, especially for shorter distances. The high altitude at which aircraft emit greenhouse gases also amplifies their warming effect through contrail formation and other atmospheric interactions. For distances under 500 miles, driving or taking a train can reduce your transport emissions by 50-80% compared to flying.