If you just want a fast answer after a single fill-up, this car MPG calculator gives you a quick miles-per-gallon result from two numbers: the miles you drove and the gallons of fuel it took to refill your tank. It’s the simplest way to check whether your car is performing close to its rated fuel economy, or to get a rough number before a longer trip without needing to log multiple fill-ups.
Trip & Fuel Data
Enter your odometer or trip data to calculate efficiency.
Awaiting Trip Data
Enter your distance traveled and fuel used to generate your economy report.
Fuel Economy
Cost Per Mile
$0.00
Cost Per 100 mi
$0.00
Est. Tank Range
— mi
Full Tank Cost
$—
For a single reading, results can vary a bit depending on driving conditions, so one fill-up won’t always reflect your car’s typical mileage. If you want a more reliable average based on several fill-ups over time, our car fuel economy calculator is built for tracking that trend rather than a one-off number. Once you have a dependable MPG figure, plug it into our car fuel cost calculator to estimate what your driving actually costs per trip or per month.