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Table 1
| Prefix | Unit |
| Kilo | 103 |
| Mega | 106 |
| Giga | 109 |
| Tera | 1012 |
| Peta | 1015 |
| Metric | Imperial |
| 1 kilogram | 2.204 pounds |
| 1 tonne | 1.10231 US short ton (2 000 lbs) |
| 1 tonne | 0.98421 UK long ton (2 240 pounds) |
| 1 kilolitre | 6.28981 barrels (bbls) |
| 1 barrel (of oil, bbl) | 158.987 litres 42 US gallons 0.1364 tonnes |
| 1 cubic metre (1 kilolitre) | 35.3147 cubic feet |
| 1 kilojoule | 0.94781 British Thermal Units (Btus) |
| 1 calorie | 4.186 joules |
| Other | |
| 1 cubic metre | 35.3147 cubic feet |
Table 2 Petroleum and coal
| Mass or volume gas | Energy & other |
| 1 cubic metre of gas | 38 megajoules as methane |
| 44 megajoules as W.A. NWS LNG | |
| 1 billion cubic metres of natural gas | 730 000 tonnes of LNG |
| 1 Trillion Cubic Feet (TCF) | Approx. 1 000 petajoules |
| Approx. 20 million tonnes | |
| 1 tonne of gas | 1 333 cubic metres |
| 1 terajoule | 26 300 cubic metres of gas |
| 0.929 million cubic feet of natural gas | |
| 17.63 tonnes of LNG | |
| 1 MCF (eg. per day) (millions cubic feet) of gas (also 1MMSFD = 1 million cubic feet per day) | 28 317 cubic metres |
| 19.39 tonne of LNG | |
| 1 057 Gigajoules | |
| 1.1 Terajoules | |
| 1 tonne of LNG | 1 460 cubic metres (at 20ºC) (or 1 333 at 0ºC) |
| 54.5 Gigajoules | |
| 9.5 bbl of Arab crude oil by energy equivalence | |
| 51.7 MMBTUs | |
| 1 tonne of crude oil | 7.33 bbls |
| 42.1 gigajoules | |
| 1 MMBTU | 1.055 Gigajoules |
| 3.6 gigajoule | 1 MWh |
| 1 petajoule (1 terajoule) | ca. 20 000 tonnes (20 tonnes) gas |
| 1 terajoule of gas per day | ca. 7 200 tonnes per year. |
| 1 million tonnes of LNG per year | 1.333 billion cubic metres per year |
| 3.65 million cubic metres of natural gas per day | |
| 100 MW power station (33% efficiency) | ca. 25 terajoules per day (10 Gigajoules/1MWh) |
| Coal | ca. 20 Gigajoules per tonne |
| Condensate | ca. 32 Megajoules per Litre |
| Crude oil | ca. 37 Megajoules per Litre |
| LNG | ca 25 Megajoules per Litre |
| Natural gas | ca. 38 Megajoules per Cubic Metre |
| Average Energy Conversion Factors | ||
| U.S. Customary Unit | Metric Equivalent | |
| Crude oil | 1 barrel | 0.1364 metric tons |
| 5.75 gigajoules | ||
| Coal | 1 short ton | 0.9072 metric tons |
| Natural gas | 1 cubic foot | 0.0283 cubic meters |
| Natural gas plant liquids | 1 barrel | 0.0862 metric tons |
| Btu/joule | 1 Btu | 1 055.1 joules |
| Petroleum products | ||
| Motor gasoline | 1 barrel | 0.1172 metric tons |
| Distillate fuel oil | 1 barrel | 0.1340 metric tons |
| Residual fuel oil | 1 barrel | 0.1502 metric tons |
| cubic metre | cubic foot gas | million Btu | therm | gigajoule | kilowatt hour | cubic metre of LNG | ton of LNG | |
| 1 cubic meter gas | 1 | 35.3 | 0.036 | 0.36 | 0.038 | 10.54 | 0.00171 | 0.000725 |
| 1 cubic foot gas | 0.0283 | 1 | 0.00102 | 0.0102 | 0.00108 | 0.299 | 0.00005 | 0.00002 |
| 1-million Btu | 27.8 | 981 | 1 | 10 | 1.054 | 292.7 | 0.048 | 0.0192 |
| 1 therm | 2.78 | 98.1 | 0.1 | 1 | 0.105448 | 29.27 | 0.0048 | 0.00192 |
| 1 gigajoule | 26.3 | 930 | 0.95 | 9.5 | 1 | 277.5 | 0.045 | 0.018 |
| 1 kilowatt hour | 0.0949 | 3.3 | 0.003415 | 0.03418 | 0.0036 | 1 | 0.000162 | 0.000065 |
| 1 cubic meter LNG | 584 | 20 631 | 21.04 | 210.4 | 22.19 | 6,173 | 1 | 0.405 |
| 1 ton LNG | 1,379 | 48 690 | 52 | 520 | 54.8 | 15 222 | 2.47 | 1 |
| 1 barrel Arabian Lt. | 0.152 | 5 350 | 5.46 | 54.6 | 5.75 | 1 597 | 0.259 | 0.105 |
| 1 ton Arabian
Lt. |
1.111 | 39 218 | 40 | 400 | 42.2 | 11 708 | 1.9 | 0.769 |
| Source: Energy Information Administration, Annual Energy Review 1995, DOE/EIA0384(95) (Washington, DC, July 1996), Appendix B. |
Gas in perspective
1TCF of gas could power the average family vehicle around the earth (40 000 kilometres) in excess of 10 million times.