Factor record · small-car-unknown-miles-scope-3-defra-2025last verified 2025-06-10 · DESNZ
0.23049
kgCO2e / miles
Historical vintage · Current: DEFRA 2026Travel 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
GHG Breakdown
CO₂
0.2289
kgCO2e/miles
CH₄
0.0004
kgCO2e/miles
N₂O
0.0012
kgCO2e/miles
Record
- Identifier
- U-Sbd6DlSSAm
- 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
- 0.23049 kgCO2e/miles
- Scope
- Scope 3*
- Scope 3 category
- Category 6
- Methodology
- activity based
- GWP
- AR5 / GWP100
- Vintage year
- 2025
- Published
- 2025
- Source reference
- Factors by Category sheet, ID 25_301_3050_9_1
- License
- Open Government Licence v3.0
- Verified
- 2025-06-10 · DESNZ
Citation
DEFRA 2025, Travel by car — Small car, Factors by Category sheet, ID 25_301_3050_9_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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