There are approximately 3.9 mmBTU in 1 kg of LNG (liquefied natural gas). This value can vary slightly depending on the specific composition of the LNG.
1 MMbtu (million British thermal units) is equivalent to approximately 0.02510 thousand cubic feet (Mcf) or 0.00002510 billion cubic feet (Bcf) of natural gas. 1 MMbtu is also roughly equivalent to 28.3 cubic meters (m³) of natural gas when considering LNG. It's essential to remember that conversion factors can vary slightly depending on the quality and composition of the gas being measured.
when convert from cubic meter to tonns multply by 0.455
It should be according to the quality of the gas, but roughly1 metric Tonne = 48 MMBtu (Downey, M. 2010, Oil101)1 metric Tonne = 48.7 MMBtu (Foss, M. 2007, Introduction to LNG, pag. 38,
1 kg of natural gas is approximately equal to 0.000001076 MMbtu.
1 standard cubic meter of natural gas is equivalent to approximately 0.74 cubic meters of liquefied natural gas (LNG) when considering the differences in volume due to the liquefaction process.
133,680.6 cubic feet.
One gallon of liquefied natural gas (LNG) is equivalent to about 0.136 cubic feet.
To convert the capacity of an LNG carrier from cubic meters to cubic feet, you would multiply the number of cubic meters by 35.3147. Therefore, for a carrier with 160,000 cubic meters of capacity, the conversion would be 160,000 * 35.3147 = 5,650,352 cubic feet.
1 kg of Lng of that particular quality will have say ' X ' k.cal per kg of calorific value from the data of LNG producer. Then 1 Ton of LNG will have 1000X when converted to B.T.U it will be 3967 multiplied by 1000 X What "particular quality" is referred to above??? Generally speaking 1 tonne (1000Kg) of LNG is considered to have a caloric value of 48 MMBtu
1ton LNG is equivalent to 2.193 cubic meters = 1315.79 cubic meters of degassified natural gas.In thermal unit, it is equivalent to 50mmBtu.However it depend on the composition and caloific value of Naural gas considered.The above value can be used for estimation purposes.
The answer will depend on where in the world you are buying. But since you have not bothered to share that crucial bit of information, I cannot provide a more useful answer.