Find your true gas mileage by dividing the miles you drove by the gallons of fuel you used. Fill up the tank, reset your trip meter, drive normally, then fill up again and note the gallons pumped and the miles traveled. Enter both numbers here and this calculator gives you your real miles per gallon, which is often lower than the sticker rating because of traffic, cold weather, load, and driving style. Tracking MPG over several tanks helps you spot problems early: a sudden drop can signal low tire pressure, a dirty air filter, or a failing sensor. It also tells you the cost per mile once you add a fuel price. All math happens in your browser, so nothing you enter leaves your device.
Miles per gallon equals the miles driven divided by the gallons of fuel used to cover that distance.
Yes. It converts your MPG to the L/100km equivalent so you can compare either way.
Yes. If you provide a fuel price, it also reports the cost per mile from your calculated MPG.
Find your true gas mileage by dividing the miles you drove by the gallons of fuel you used. Fill up the tank, reset your trip meter, drive normally, then fill up again and note the gallons pumped and the miles traveled.
Yes. MPG Calculator is completely free, with no sign-up and no usage limits.
Yes. MPG Calculator runs in any modern web browser. There is nothing to download or install.
Yes. MPG Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.