Commute Carbon Calculator
One-way Distance (km)
Transport Mode
Working Days/Year
A commute carbon calculator estimates the CO₂ emissions from your daily commute based on transport mode, distance, and vehicle type. Transport accounts for ~27% of UK and ~29% of US greenhouse gas emissions.
- 1Car: ~170 g CO₂/km (average petrol car)
- 2Train: ~35–41 g CO₂/km (UK average)
- 3Bus: ~89 g CO₂/km
- 4Cycling and walking: ~0 g CO₂/km (operational emissions)
20km daily commute by petrol car, 5 days/week=Daily: 20 × 2 × 170g = 6,800g; Annual (230 days): ~1,564 kg CO₂
| Mode | CO₂ per km (g) | Annual (20km each way, 230 days) |
|---|---|---|
| Petrol car (avg) | ~170 g/km | ~1,564 kg |
| Diesel car (avg) | ~145 g/km | ~1,334 kg |
| EV (UK grid) | ~50 g/km | ~460 kg |
| Train (UK avg) | ~41 g/km | ~377 kg |
| Bus | ~89 g/km | ~819 kg |
| Bicycle/walking | ~0 g/km | ~0 kg |
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