ENERGY UNITS AND CONVERSION FACTORS METRIC PREFIXES kilo (k) = 10 3 mega (M) = 10 6 giga (G) = 10 9 tera (T) = 10 12 peta (P) = 10 15 exa (E) = 10 18 Example: 1 TJ = 1,000 GJ = 1,000,000 MJ = 1,000,000,000 kJ = 1,000,000,000,000 J VOLUME 1 m 3 = 1,000 litres (l) 1 US gallon = 3.785412 l 1 Imperial gallon = 4.546090 l ENERGY UNIT CONVERSION Multiply by: GJ Toe MBtu MWh GJ 1 0.024 0.948 0.278 Toe 41.868 1 39.683 11.630 MBtu 1.055 0.025 1 0.293 MWh 3.600 0.086 3.412 1 Example: 1 MWh x 3.600 = 3.6 GJ BIOFUELS CONVERSION Ethanol: 21.4 MJ / l Biodiesel: 32.7 MJ / l HVO: 34.4 MJ/l Petrol: 36 MJ/l Diesel: 41 MJ/l Note on Biofuels: 1) These values can vary with fuel and temperature. 2) Around 1.7 litres of ethanol is energy equivalent to 1 litre of petrol, and around 1.2 litres of biodiesel is energy equivalent to 1 litre of diesel. 3) Energy values from http://ec.europa.eu/eurostat/statistics-explained/index.php/Glossary:Tonnes_of_oil_equivalent_(toe) except HVO, which is from Neste Renewable Diesel Handbook, p. 15, https://www.neste.com/sites/default/files/attachments/neste_renewable_diesel_handbook.pdf. SOLAR THERMAL HEAT SYSTEMS 1 million m2 = 0.7 GWth Used where solar thermal heat data have been converted from square metres (m2) into gigawatts-thermal (GWth), by accepted convention. Share via: