Conversion Factors

This page contains some useful conversion factors when dealing with Natural Gas and LNG.

 

It is interesting to compare LNG with oil to get a handle on some basic conversions. A barrel of oil when burnt contains approximately 5.8 x 106 BTU of energy.

 

Natural Gas and LNG billion m3 NG billion ft3 NG million tonnes OE million tonnes LNG trillion BTUs
1 billion m3 NG 1 35.30 0.900 0.740 35.70
1 billion ft3 NG 0.028 1 0.025 0.021 1.01
1 million tonnes OE 1.110 39.20 1 0.820 39.70
1 million tonnes LNG 1.360 48.00 1.220 1 48.60
1 trillion BTUs 0.028 0.99 0.025 0.021 1

Source: BP

 

Other useful conversions
1 metric tonne = 2204.6226 lb = 1.10231 short tons
1 kJ = 0.2301 kcal = 0.9478 BTU
1 BTU = 0.2522 kcal = 1.0551 kJ
1 kWh = 3600 kJ = 3412 BTU
1 barrel = 42 US Gal = 158.9873 L
1 Litre = 0.264172 US Gal = 0.219969 Imp Gal

Source: Perry's Engineering Handbook, 8th edition.

NB: The conversion factors have been quoted to a large number of decimal places, as the quantities of gas traded / produced normally runs to millions of tonnes in any calculation.