CO2 Emissions per Mile/km Calculator
Calculate CO2 emissions per mile or kilometer by vehicle type and fuel type.
Understand your carbon footprint from driving.
CO2 Emissions Estimate
CO2 emissions from driving depend on fuel type, fuel efficiency, and distance traveled.
Formula:
CO2 per mile = CO2 per gallon / Miles per gallon (MPG)
CO2 produced per unit of fuel burned:
- Gasoline: 8,887 grams CO2 per gallon (2,348 g/liter)
- Diesel: 10,180 grams CO2 per gallon (2,689 g/liter)
- E85 (Ethanol): 6,500 grams CO2 per gallon (1,717 g/liter)
Average CO2 per mile by vehicle type:
| Vehicle Type | Avg MPG | CO2 g/mile | CO2 g/km |
|---|---|---|---|
| Compact car | 32 | 278 | 173 |
| Sedan | 28 | 317 | 197 |
| SUV | 22 | 404 | 251 |
| Pickup truck | 18 | 494 | 307 |
| Hybrid | 48 | 185 | 115 |
| Electric (US avg grid) | — | ~120 | ~75 |
Note: Electric vehicle emissions vary by electricity source. The US average is ~0.86 lbs CO2 per kWh.