Carbon Footprint Calculator — Formula
## How Carbon Footprint Is Estimated
Your carbon footprint includes emissions from transportation, home energy, and air travel.
### Emission Factors Used
- **Driving**: 19.6 lbs CO2 per gallon of gasoline
- **Electricity**: 0.92 lbs CO2 per kWh (US average)
- **Natural Gas**: 11.7 lbs CO2 per therm
- **Flights**: ~90 kg CO2 per flight hour per passenger (x 2.2 for lbs)
Your carbon footprint includes emissions from transportation, home energy, and air travel.
### Emission Factors Used
- **Driving**: 19.6 lbs CO2 per gallon of gasoline
- **Electricity**: 0.92 lbs CO2 per kWh (US average)
- **Natural Gas**: 11.7 lbs CO2 per therm
- **Flights**: ~90 kg CO2 per flight hour per passenger (x 2.2 for lbs)
Esempio Risolto
12,000 miles at 28 MPG, 900 kWh/mo electricity, 40 therms/mo gas, 10 flight hours.
- Driving = 12,000 / 28 x 19.6 = 8,400 lbs CO2
- Electricity = 900 x 12 x 0.92 = 9,936 lbs CO2
- Natural gas = 40 x 12 x 11.7 = 5,616 lbs CO2
- Flights = 10 x 90 x 2.2 = 1,980 lbs CO2
- Total = 8,400 + 9,936 + 5,616 + 1,980 = 25,932 lbs = 11.8 tonnes