Loading...
Loading...
Every emission factor used in CarbonCrux calculators comes from a named government or intergovernmental source. This page documents each source, what it covers, and how we apply it.
Each calculator takes a user input (e.g. km driven, kWh consumed, kg of food) and multiplies it by the relevant emission factor for the selected country. Factors are expressed in kg CO₂-equivalent (CO₂e) per unit of activity. Where a user's country lacks a specific factor, we fall back to the closest regional equivalent or the IPCC global average.
CEA publishes India’s annual grid CO₂ factors; CarbonCrux applies them to all electricity calculations for India.
EPA eGRID and GHG factors supply US grid, transport, and waste intensities used across CarbonCrux US tools.
DEFRA conversion factors are the UK government’s official emissions factors for power, fuels, travel, waste, and materials.
EEA CO₂ intensity covers EU power generation; we blend EU-wide and country-specific values where available.
ECCC’s National Inventory gives Canada’s official factors for electricity, transport, buildings, and waste.
Australian NGA factors publish state grid intensities plus transport and energy factors we use nationwide.
IPCC AR6 WGIII supplies global food, land-use, aviation forcing, and lifecycle factors that anchor diet and travel models.
If you spot an outdated factor or a source we should add, please contact us via the About page. We update factors when official sources publish new editions, typically once per year.