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Useful LNG and Gas Conversion Factor


In this post, I want to share you a quite simple yet useful post, which is LNG conversion table. For your information, I have been working in several LNG regasification project, therefore this conversion is like my daily “menu”.

I hope you find this useful.

Conversion from tonnes LNG

tonnes LNG = 2.21 m3 LNG (liquid) (1)

tonnes LNG = 0.00127 m3 gas (n) (2)

tonnes LNG = 44.96 ft3 gas (n) (2)

tonnes LNG = 47.53 ft3 gas standard (scf) (3)

tonnes LNG = 51.02 MMBTU

Conversion from tonnes m3 LNG (liquid) (1)

m3 LNG (liquid) (1) = 0.45 tonnes LNG

m3 LNG (liquid) (1) = 571 m3 gas (n) (2)

m3 LNG (liquid) (1) = 20.17 ft3 gas (n) (2)

m3 LNG (liquid) (1) = 21.31 ft3 gas standard (scf) (3)

m3 LNG (liquid) (1) = 23.12 MMBTU

Conversion from m3 gas (n) (2)

m3 gas (n) (2) = 7.85 x 10-4 tonnes LNG

m3 gas (n) (2) = 1.75 x 10-3 m3 LNG (liquid) (1)

m3 gas (n) (2) = 3.53 x 10-2 ft3 gas (n) (2)

m3 gas (n) (2) = 3.73 x 10-2 ft3 gas standard (scf) (3)

m3 gas (n) (2) = 37.33 MMBTU

Conversion from ft3 gas (n) (2)

ft3 gas (n) (2) = 2.22 x 10-8 tonnes LNG

ft3 gas (n) (2) = 4.96 x 10-5 m3 LNG (liquid) (1)

ft3 gas (n) (2) = 2.83 x 10-2 m3 gas (n) (2)

ft3 gas (n) (2) = 1.05 ft3 gas standard (scf) (3)

ft3 gas (n) (2) = 1.15 x 10-3 MMBTU

Conversion from ft3 gas standard (scf) (3)

ft3 gas standard (scf) (3)= 2.10 x 10-8 tonnes LNG

ft3 gas standard (scf) (3) = 4.69 x 10-5 m3 LNG (liquid) (1)

ft3 gas standard (scf) (3) = 2.68 x 10-2 m3 gas (n) (2)

ft3 gas standard (scf) (3) = 0.948 ft3 gas (n) (2)

ft3 gas standard (scf) (3) = 1.09 x 10-3 MMBTU

Conversion from MMBTU

MMBTU = 1.96 x 10-2 tonnes LNG

MMBTU = 4.33 x 10-2 m3 LNG (liquid) (1)

MMBTU = 24.69 m3 gas (n) (2)

MMBTU = 872.2 ft3 gas (n) (2)

MMBTU = 920.1  ft3 gas standard (scf) (3)

Note:

(1) Calculated according to ISO 6579 (T = -160oC)

(2) Calculated according to ISO 6976 (0oC / 0oC, 1.01325 bar)

(3) Standard condition (15oC / 15oC, 1.01325 bar)

References:

The LNG Industry GIIGNL Annual Report 2018 (https://giignl.org/) 

2 thoughts to “Useful LNG and Gas Conversion Factor”

  1. Good content, However some data also depend on its composition, i.e not every LNG had density 0.45 but as approximate is OK. you may know about lean LNG or Rich LNG. Also usually we used ratio 1:600 for volume of LNG when converted to gas (approximate) instead of 571. Another useful information like how much power 1 can generate for 1 m3 LNG , or how mu.ch duty required to vaporize 1 m3 LNG.

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