Estimate the greenhouse-gas footprint of a trip from activity data and an editable emissions factor. The result shows total metric tons of CO₂ equivalent, a useful normalized figure, and the underlying activity so you can compare scenarios without hiding the assumptions.
The total is an estimate for the sources represented by the inputs, not a complete life-cycle inventory unless your factors and boundary make it one.
Emission factors vary by mode, fuel, geography, year, and reporting method. Keep the factor source with your records.
A 500 km route, two legs, one traveler, and a factor of 0.115 kg CO₂e per passenger-km gives 1,000 passenger-km and 0.115 t CO₂e (115 kg).
Use activity data from the same reporting period and emission factors that match the activity, geography, and unit.
It reports carbon dioxide equivalent, so other greenhouse gases may be included when the emission factors already express their combined climate impact as CO2e.
Results can differ because system boundaries, emission factors, allocation methods, and the age of source data may not match.
Use it for planning and screening. A complete inventory may require additional sources and assurance. Formal disclosures may require documented factors, organizational boundaries, and independent review.
Update it when activity levels, suppliers, energy sources, travel patterns, emission factors, or carbon prices change materially.
| Variable | Meaning |
|---|---|
| Activity | Distance or energy consumed |
| Factor | kg CO₂e per activity unit |
| Result | Metric tons CO₂e |