UK Fuel Calorific Values & Conversion Factors

Gross and net calorific values, densities and volume-to-mass factors for eleven UK transport, heating and industrial fuels — natural gas, petrol, diesel (average biofuel blend and 100% mineral), gas oil (red diesel), aviation turbine fuel, burning oil, fuel oil, LPG, and domestic and industrial coal — from the DEFRA/DESNZ 2026 UK Government GHG Conversion Factors. 54 parameters covering gross/net calorific value (GJ per tonne and kWh per litre or kilogram), density (kg/L and kg/m³) and litres-per-tonne. Supplied as machine-readable JSON and a flat CSV. This is a curated, versioned projection over the GreenCalculus MasterBrain data layer; please also cite the upstream DEFRA/DESNZ source (Open Government Licence v3.0). Reference page: https://greencalculus.com/data/fuel-calorific-values/