How many miles will you get for a dollar spent on fuel? As in, one dollar, how far will that get me with my vehicle?

Calculates the distance you can travel by car on a per-dollar basis.

You will need to know your average miles per gallon (MPG) of fuel consumption of your car.

average MPG ÷ $PG = MP$

where MPG = miles per gallon.
$PG = dollar price per gallon of fuel.
MP$ = miles travelled per dollar.

Example

Your average miles per gallon is 24.
The price of one gallon of fuel is $3.84.
You spend $35 on fuel.

24 ÷ 3.84 = 6.25

It will cost you one dollar to travel 6.25 miles.

Multiplying the distance per dollar with the amount spent on fuel;

6.25 * 35 = 218.75

The 35 dollars you spend on fuel will get you a distance of 218.75 miles.