Emission factor
Rail (national) — 0.035 kg CO₂e / passenger-km
The emission factor for Rail (national) is 0.035 kg CO₂e per passenger-km, based on UK DEFRA (2024).
Factor details
| Value | 0.035 kg CO₂e |
|---|---|
| Unit | passenger-km |
| Region | Region-independent |
| Category | Transport |
| Typical scope | Scope 1 for owned vehicles, Scope 3 for third-party travel. |
| Source | UK DEFRA, 2024 |
What this means
Transport factors convert distance travelled into emissions and vary by vehicle type and occupancy. Use them for owned vehicles (Scope 1) and for business travel on third-party transport (Scope 3).
Worked example
1,000 passenger-km × 0.035 kg CO₂e = 35 kg CO₂e ≈ 0.035 t CO₂e.
Quick conversions
1 1,000 passenger-km = 35 kg CO₂e (0.035 t CO₂e)
Frequently asked questions
What is the emission factor for Rail (national)?
The emission factor for Rail (national) is 0.035 kg CO₂e per passenger-km, according to UK DEFRA (2024).
How do I use an emission factor?
Multiply your activity data (in passenger-km) by 0.035 to get emissions in kg CO₂e, then divide by 1,000 for tonnes.