propane
liquid gasDESNZ 'Propane'. LPG is a propane/butane mixture, so its figures sit between the two pure gases — check which one you mean. EIA US cross-check: 5.75 kg CO2/gal, 91,452 Btu/gal, 62.88 kg CO2/MMBtu (2022 vintage) — never averaged with DESNZ.
Easily confused with
Different products with different numbers. Check you are on the right one.
Density
514.933 kg/m³
at liquid phase (pressurised)
Heating values
LHV/NCV
HHV/GCV
Emission factors
| Metric | Value | Scope | Region / year | Source |
|---|---|---|---|---|
| CO₂ | 1.5414 kgCO2/L | direct combustion | UK · 2025 | |
| CO₂e | 1.54358 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 · propane
Conversion results
Energy
Same energy expressed in other units.
23.89 MJ
6.637 kWh
0.02389 GJ
22,650 BTU
25.95 MJ
7.209 kWh
0.02595 GJ
24,600 BTU
Mass
0.5149 kg
Volume
Emissions
CO₂ and CO₂e are separate — never derived from each other.
~1.54 kg CO2
~1.54 kg CO2e
Energy density
Energy per unit of mass or volume.
46.4 MJ/kg
6.637 kWh/L
Assumptions
- density: assumed propane density 514.933 kg/m³ at liquid phase (pressurised)
- heating value basis: energy on LHV/NCV basis, 6.637 kWh/L
- heating value basis: energy on HHV/GCV basis, 7.209 kWh/L
Sources
Follow each source back to its primary document — that traceability is the point. How conversions work →