Carbon Footprint Calculator
Estimate your annual CO₂ emissions from driving, flying, home electricity, gas, and diet. A rough but useful starting point for thinking about climate impact.
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About Carbon Footprint Calculator
Where the numbers come from
Standard emission factors from the EPA, IEA, and IPCC: 8.89 kg CO₂ per gallon of gas, ~0.39 kg per kWh of US electricity, ~5.3 kg per therm of natural gas. Flight figures are simplified — they vary widely by aircraft, load factor, and route.
What this misses
Consumer goods, public spending (defense, infrastructure), shipping, water heating specifics, vacation rentals, secondary effects. Detailed footprint calculators (EPA Equivalencies, CoolClimate) capture more. This is for quick personal awareness.
High-impact actions
Fly less (one international flight = ~1 tonne). Switch to renewable electricity (often free or cheap to opt in). EV over ICE car. Eat plant-based more often. These five categories cover the majority of typical personal emissions.