About the fuel cost calculator
Enter how far you are going, your vehicle's fuel economy and the price of fuel to see how much fuel the trip uses and what it costs. US units use miles, miles per gallon and dollars per gallon; metric units use kilometers, liters per 100 km and a price per liter.
Turn on round trip to double the distance, and enter the number of people to split the bill evenly. Real consumption changes with speed, load, weather and traffic, so treat the result as an estimate.
Formula
- US: fuel (gal) = miles ÷ mpg
- Metric: fuel (L) = km × L/100 km ÷ 100
- Cost = fuel × price per unit
- Cost per person = cost ÷ passengers
Example
A 300 mile trip at 28 mpg uses 10.71 gallons. At $3.50 per gallon the cost is $37.50, or $0.125 per mile.