LPG
liquid gasDESNZ 'LPG' (mixed propane/butane). IPCC 2006 Liquefied Petroleum Gases NCV 47.3 MJ/kg, CO2 63,100 kg/TJ. See separate 'propane' and 'butane' entries for the pure gases.
- LPG density and energy per litre depend on the propane/butane mix and on the liquid vs gas phase. Litre figures here are for the pressurised liquid.
Easily confused with
Different products with different numbers. Check you are on the right one.
Density
529.749 kg/m³
at liquid phase (pressurised)
Heating values
LHV/NCV
HHV/GCV
Emission factors
| Metric | Value | Scope | Region / year | Source |
|---|---|---|---|---|
| CO₂ | 1.55491 kgCO2/L | direct combustion | UK · 2025 | |
| CO₂e | 1.55713 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 · LPG
Conversion results
Energy
Same energy expressed in other units.
24.34 MJ
6.761 kWh
0.02434 GJ
23,070 BTU
26.13 MJ
7.259 kWh
0.02613 GJ
24,770 BTU
Mass
0.5297 kg
Volume
Emissions
CO₂ and CO₂e are separate — never derived from each other.
~1.55 kg CO2
~1.56 kg CO2e
Energy density
Energy per unit of mass or volume.
45.94 MJ/kg
6.761 kWh/L
Assumptions
- density: assumed LPG density 529.749 kg/m³ at liquid phase (pressurised)
- heating value basis: energy on LHV/NCV basis, 6.761 kWh/L
- heating value basis: energy on HHV/GCV basis, 7.259 kWh/L
Sources
Follow each source back to its primary document — that traceability is the point. How conversions work →