CNG
gas gasDESNZ 2025 'CNG' — natural gas compressed for vehicle fuel and storage. Chemically the same gas as the 'natural gas' entry, but 175 kg/m³ against 0.802 kg/m³, so a volume of CNG holds 218x the energy of the same volume of pipeline gas. DESNZ publishes no CO2-only component for this row, so only the CO2e total is carried — CO2 and CO2e are never derived from one another.
- DESNZ does not state the pressure or temperature its CNG density of 175 kg/m³ refers to. Compressed-gas density depends strongly on both, so treat a volume-based CNG answer as indicative of the DESNZ basis, not of your own tank.
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
- LNG 452.489 kg/m³ 1.17797 kgCO2e/L
- methane 0.716 kg/m³
Density
175 kg/m³
at compressed (storage pressure per DESNZ fuel-properties sheet; the pressure itself is NOT stated by the source)
Heating values
HHV/GCV not available — not derived from LHV.
Emission factors
| Metric | Value | Scope | Region / year | Source |
|---|---|---|---|---|
| CO₂e | 0.4507 kgCO2e/L | direct combustion | UK · 2025 |
CO₂ ≠ CO₂e — separate metrics, never converted into one another. What these metrics mean →
Worked example
Open in converter →Conversion results
Energy
Same energy expressed in other units.
Mass
Volume
Emissions
CO₂ and CO₂e are separate — never derived from each other.
Energy density
Energy per unit of mass or volume.
Assumptions
- density: assumed CNG density 175 kg/m³ at compressed (storage pressure per DESNZ fuel-properties sheet; the pressure itself is NOT stated by the source)
- heating value basis: energy on LHV/NCV basis, 45.745 MJ/kg
Sources
Follow each source back to its primary document — that traceability is the point. How conversions work →