Factor record · small-car-unknown-km-scope-3-defra-2026last verified 2026-07-31 · DESNZ
0.14282
kgCO2e / km
Travel by car — Small 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
0.28% lower than 2025
0.14322 kgCO2e/km in 2025
GHG Breakdown
CO₂
0.1418
kgCO2e/km
CH₄
0.0002
kgCO2e/km
N₂O
0.0008
kgCO2e/km
Record
- Identifier
- 75af7c8c5cff
- Activity
- Travel by car — Small car
- Activity class
- Business travel · Road transport · Passenger car
- Category
- transport
- Sub-category
- Cars (by size)
- Vehicle size
- Small car
- Fuel / powertrain
- Average / unknown
- Region
- GBR · United Kingdom
- Value
- 0.14282 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_3050_4_1
- License
- Open Government Licence v3.0
- Verified
- 2026-07-31 · DESNZ
Citation
DEFRA 2026, Travel by car — Small car, Factors by Category sheet, ID 25_301_3050_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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