How it works
Divide the trip distance by your vehicle's miles per gallon to get the gallons you will burn, then multiply by the price per gallon for the total fuel cost. Cost per mile is that total divided by the distance — a handy figure for comparing vehicles or deciding whether driving beats another option. Real MPG varies with speed, load, hills, and weather, so treat the result as a planning estimate and round up a little for a long trip.
Frequently asked questions
Why does my real MPG differ?
City driving, hills, heavy loads, air conditioning, and high speeds all lower MPG compared with the official figure.
Can I use this for a round trip?
Yes — just enter the total round-trip distance instead of one-way distance.