Everyday Life
Gas Mileage & Fuel Cost Calculator
Estimate total fuel volume and financial costs for road trips and commutes.
Inputs
Results
Estimated Trip Cost
$0.00
Fuel Volume Required
0.00 Gallons
Cost per Distance Unit
$0.00 / Mile
How It Works
In imperial terms, the calculator finds total fuel as $V = \frac{\text{Distance}}{\text{MPG}}$ and cost as $C = V \times P$. In metric terms, it uses $V = \frac{\text{Distance}}{100} \times L/100km$ and cost $C = V \times P$. Cost per mile/kilometer is simply total cost divided by distance.
Formula Used
Total Fuel = Distance / Fuel Efficiency
To find the total volume of fuel needed for a trip, the distance is divided by the vehicle's fuel efficiency rating (MPG or L/100km).
Total Cost = Total Fuel × Price Per Unit
The total monetary cost of the trip is computed by multiplying the volume of fuel required by the price per unit of fuel (gallon or liter).
Worked Example
Here is a step-by-step example of how these values are calculated:
Distance
300 Miles
Efficiency
25 MPG
Price
$3.50/Gallon
Result: Fuel Needed: `12.00 Gallons`. Trip Cost: `$42.00`. Cost per Mile: `$0.14`.
Frequently Asked Questions
What factors lower fuel efficiency?
Vehicles consume significantly more fuel during aggressive acceleration, highway speeds exceeding 60 mph (96 km/h), carrying heavy loads, running air conditioning, or maintaining under-inflated tires.
Why does metric use L/100km instead of km/L?
Most metric standard countries measure gas usage as a volume consumption rate per constant distance (Liters consumed per 100 Kilometers) rather than distance per volume, because it allows linear aggregation of fleet consumption averages.