Tools
Carbon footprint calculators
Measuring comes before reducing. Two transparent calculators estimate annual greenhouse-gas emissions with published government factors, and show every assumption behind the number.
Home electricity and fuels, vehicles, public transport, flights and waste. Unknown amounts can use clearly labeled U.S. averages.
For businesses and organizations Business & organizationScope 1 fuels, fleet and refrigerants; Scope 2 electricity, location- and market-based, reported separately; six Scope 3 categories with all 15 shown for coverage.
Private by design
Everything is calculated in your browser. Nothing you enter is sent, stored or tracked, and no email is required.
Transparent
Each result lists the activity, the emission factor, its source table and year, and whether the value came from you or from a default.
Honest about gaps
Unknown or unsupported categories are shown as not included, never silently counted as zero. Offsets are never subtracted.
Results are preliminary estimates for information and planning. They are not a verified, certified or audited inventory and do not certify neutrality. Factors: U.S. EPA GHG Emission Factors Hub 2025, eGRID2023 and Brazil MCTI 2023. Methodology WF-CFC 1.0 (2026-11-10). Read the methodology and factor register. Available in English only for now.