Calculator · prototype

Your footprint, step by step.

Electricity per month (kWh) Natural gas per month (therms) People in household

U.S. averages prefilled. Home totals are split across the household.

Miles driven per year Vehicle fuel economy (mpg)

Short (<300 mi each way) Medium (300–2,300 mi) Long (>2,300 mi)

Assumed one-way distances: 200, 1,000 and 4,000 miles.

Which best describes you?

AI chatbot prompts per day Video streaming hours per day

Per-use digital emissions are small and uncertain. The bigger issue is total data-center growth.

0 tCO₂e/yr

1 credit = 1 tCO₂e. To cover a year you'd need 0 credits.

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Sources for emission factors

U.S. EPA, eGRID2023 U.S. average CO₂ total output emission rate, 771.5 lb/MWh (as published in the GHG Emission Factors Hub 2025). epa.gov/egrid
U.S. EPA, GHG Emission Factors Hub (2025 edition: natural gas 53.06 kg CO₂/MMBtu; air travel 0.207 / 0.129 / 0.163 kg CO₂ per passenger-mile). epa.gov/climateleadership/ghg-emission-factors-hub
U.S. EPA, Greenhouse Gas Emissions from a Typical Passenger Vehicle (8,887 g CO₂/gallon gasoline). epa.gov/greenvehicles
Scarborough et al. (2014), "Dietary greenhouse gas emissions of meat-eaters, fish-eaters, vegetarians and vegans in the UK," Climatic Change 125:179–192. doi.org/10.1007/s10584-014-1169-1
Google (Aug 2025), "Measuring the environmental impact of AI inference" (median Gemini text prompt ≈ 0.24 Wh, 0.03 g CO₂e). cloud.google.com/blog
IEA, Kamiya (2020), "The carbon footprint of streaming video" (≈0.077 kWh/hour). iea.org

Estimates are simplified (CO₂ only for energy and travel; no radiative forcing multiplier for flights). Projects and registry IDs are fictional.