LNG
liquid gasDESNZ 2025 'LNG' — chemically natural gas, but ~600× denser in energy per volume than gaseous natural gas. Per-litre CO2e in DESNZ = 1.17797 kgCO2e/L. The per-L heating value is derived from DESNZ's liquid density × gravimetric CV.
- 1 m³ (or 1 L) of LIQUEFIED natural gas is NOT the same as 1 m³ of GASEOUS natural gas: LNG is ~600× denser in energy per volume. Never convert LNG volume directly to gas volume — go via mass/energy. This entry is the liquid phase.
Easily confused with
Different products with different numbers. Check you are on the right one.
- natural gas 0.802 kg/m³ 2.06672 kgCO2e/m3
- CNG 175 kg/m³ 0.4507 kgCO2e/L
- methane 0.716 kg/m³
Density
452.489 kg/m³
at liquefied (cryogenic, ~−162 °C)
Heating values
LHV/NCV
HHV/GCV
Emission factors
| Metric | Value | Scope | Region / year | Source |
|---|---|---|---|---|
| CO₂e | 1.17797 kgCO2e/L | direct combustion | UK · 2025 |
CO₂ ≠ CO₂e — separate metrics, never converted into one another. What these metrics mean →
Worked example
Open in converter →Converting
1 L · LNG
Conversion results
Energy
Same energy expressed in other units.
20.7 MJ
5.75 kWh
0.0207 GJ
19,620 BTU
22.93 MJ
6.37 kWh
0.02293 GJ
21,740 BTU
Mass
0.4525 kg
Volume
Emissions
CO₂ and CO₂e are separate — never derived from each other.
~1.18 kg CO2e
Energy density
Energy per unit of mass or volume.
45.74 MJ/kg
5.75 kWh/L
Assumptions
- density: assumed LNG density 452.489 kg/m³ at liquefied (cryogenic, ~−162 °C)
- heating value basis: energy on LHV/NCV basis, 5.750 kWh/L
- heating value basis: energy on HHV/GCV basis, 6.370 kWh/L
Sources
Follow each source back to its primary document — that traceability is the point. How conversions work →
Sources
Learn more
HHV/GCV vs LHV/NCV Higher heating value counts the heat of condensing water vapour; lower heating value does not. The gap can be 5–20%.Why fuel conversions are approximate Density, calorific value and emission factors are material properties that vary — so fuel results are sourced estimates, not constants.