Factor record · medium-car-unknown-km-scope-3-defra-2026last verified 2026-07-31 · DESNZ
0.17322
kgCO2e / km
Travel by car — Medium car
Business travel · Road transport · Passenger car
Fuel / powertrain
Use this average value when the car’s fuel or powertrain is not known.
Vintage
Select unit
Unchanged from 2025
0.17322 kgCO2e/km in 2025
GHG Breakdown
CO₂
0.1720
kgCO2e/km
CH₄
0.0002
kgCO2e/km
N₂O
0.0010
kgCO2e/km
Record
- Identifier
- 48060576c564
- Activity
- Travel by car — Medium car
- Activity class
- Business travel · Road transport · Passenger car
- Category
- transport
- Sub-category
- Cars (by size)
- Vehicle size
- Medium car
- Fuel / powertrain
- Average / unknown
- Region
- GBR · United Kingdom
- Value
- 0.17322 kgCO2e/km
- Scope
- Scope 3*
- Scope 3 category
- Category 6
- Methodology
- activity based
- GWP
- AR5 / GWP100
- Vintage year
- 2026
- Published
- 2026
- Source reference
- Factors by Category sheet, ID 25_301_3058_4_1
- License
- Open Government Licence v3.0
- Verified
- 2026-07-31 · DESNZ
Citation
DEFRA 2026, Travel by car — Medium car, Factors by Category sheet, ID 25_301_3058_4_1
Methodology
Derived from direct physical activity measurements (litres, kilometres, kilograms). The most accurate approach where activity data exists.
Notes
* Scope 3 boundary · Use this factor for Scope 3 Category 6 passenger road journeys undertaken for business in vehicles outside the reporting organisation’s ownership or control. Choose the car, motorbike, bus, coach, or taxi record and unit that match the travel data available. Separate factors apply to employee commuting, owned or controlled vehicles, freight transport, rail travel, and upstream well-to-tank emissions.
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