Free tools
Carbon footprint calculator
Calculate with the official conversion factors published by the UK Government and the US EPA. No factor is written into this page: it comes from the source file and is refreshed on a schedule.
United Kingdom — GHG conversion factors
Every item carries its own unit in the source (litres, km, tonne.km, kWh, room per night). Pick the scope, then the category, then the item.
Your calculation
| Item | Quantity | Factor | kg CO2e |
|---|
The calculation stays in your browser; nothing is sent to a server.
United States — electricity by eGRID subregion
In the United States the grid factor is not national: it depends on the eGRID subregion the site draws power from.
United States — mobile combustion
Fuel factors are published per gallon or per standard cubic foot, not per litre.
United States — stationary combustion factors
| Fuel | Group | kg CO2 / mmBtu | kg CO2 / unit | Unit |
|---|