Well-to-Wheel Emissions Calculator

Enter your Vehicle Type, Powertrain, Fuel Efficiency, and Annual Miles into the Well-to-Wheel Emissions Calculator to find your Total CO2e — broken down into Well-to-Tank and Tank-to-Wheel emissions, plus Emission Intensity per mile.

MPG

City/highway combined MPG or MPGe for electric vehicles

miles

For regional electricity grid emissions factor

Results

Total Well-to-Wheel CO2e

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Well-to-Tank Emissions

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Tank-to-Wheel Emissions

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Emission Intensity

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Well-to-Wheel Emissions Breakdown

Frequently Asked Questions

What is the difference between well-to-wheel, well-to-tank, and tank-to-wheel emissions?

Well-to-wheel (WTW) includes all lifecycle emissions. Well-to-tank (WTT) covers upstream fuel production, refining, and delivery. Tank-to-wheel (TTW) covers direct emissions from vehicle operation.

How does the calculator determine regional electricity emissions factors?

The calculator uses your ZIP code to determine your regional electricity grid mix and applies the corresponding CO2e emissions factor per kWh based on EPA eGRID data.

Why do electric vehicles still have well-to-tank emissions?

Electric vehicles have upstream emissions from electricity generation at power plants. The amount depends on your local grid's energy mix - renewable grids produce lower WTT emissions.

How accurate are these emissions calculations?

The calculator uses EPA and ISO 14083:2023 methodology with industry-standard emissions factors. Results are estimates that may vary based on actual driving conditions and fuel sources.

What makes hydrogen fuel cell vehicles environmentally friendly?

Hydrogen vehicles have zero direct emissions, but their total impact depends on hydrogen production method. Green hydrogen from renewable electrolysis has the lowest lifecycle emissions.

How do hybrid vehicles compare to conventional gasoline cars?

Hybrids typically reduce both WTT and TTW emissions through improved fuel efficiency. Plug-in hybrids can achieve even lower emissions when charged with clean electricity.

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