Fuel for vehicle:
Calculate the gallons used and your cost for them one of two ways: either
Then to find the self-tax, specify either
The government says the average is 42.6 person miles per gallon, though more if the plane is full,
and variable according to type of plane and other factors. This means that if you are the sole occupant of a car that
gets 42.6 mpg, flying and driving have equivalent carbon use. If you have a passenger, driving is better.