Carbon Footprint Calculator
Estimate your yearly CO₂ emissions across the big categories
Annual Footprint
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This carbon footprint calculator estimates your annual CO₂ emissions in tons from the four biggest sources: driving, home electricity, air travel, and diet. Compare your result to the U.S. average (~16 tons) and the global average (~4 tons) to see where you stand.
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Frequently Asked Questions
What is a carbon footprint?
A carbon footprint is the total greenhouse gas emissions, measured in tons of CO₂ equivalent, caused by your activities in a year — driving, electricity, flights, diet, and consumption. The U.S. average is about 16 tons per person; the global average is around 4 tons.
How is a carbon footprint calculated?
Each activity is multiplied by an emission factor. For driving, gallons of gas burned × 8.887 kg CO₂ per gallon. For electricity, kWh × your grid's emission rate. Flights, diet, and goods each have standard per-unit factors that are summed into an annual total.
What is a good carbon footprint?
To help limit warming to 1.5°C, scientists suggest an average of about 2 tons of CO₂ per person per year by 2050. Anything under the ~4-ton global average is comparatively low; the ~16-ton U.S. average is high.
What has the biggest impact on my footprint?
For most people the biggest levers are air travel, driving, home energy, and diet. Cutting one long-haul round-trip flight, switching to renewable electricity, or reducing red-meat consumption each remove roughly one ton or more per year.
How can I reduce my carbon footprint?
Drive less or switch to an EV, fly less, improve home insulation, switch to renewable energy, eat less red meat, and reduce consumption of new goods. Small consistent changes across categories add up faster than one big change.