Estimates CO2 emissions from driving, using the US EPA’s published average emission rate for a typical passenger vehicle.
How it works
Miles driven are multiplied by 0.404 kg of CO2 per mile, the EPA’s published national average for a typical gasoline passenger vehicle.
What this does not include
This uses a national average figure — actual emissions vary by vehicle fuel economy, fuel type (electric or hybrid vehicles emit far less at the tailpipe), and driving conditions.
How to use this calculator
- Enter the number of miles driven.
Frequently asked questions
Why does this use an average instead of my specific car’s fuel economy?
A vehicle-specific figure would need your car’s actual miles-per-gallon rating; this calculator gives a quick estimate using the EPA’s typical-vehicle average instead.
Does an electric vehicle produce zero emissions by this calculation?
This tailpipe-based figure assumes a gasoline vehicle — an EV’s true footprint instead depends on the emissions from generating the electricity that charges it.
How does this compare to a flight’s emissions?
Aviation emissions are calculated very differently (often per passenger-mile at cruising altitude) and are outside the scope of this calculator.
