Enter the miles you drove and the gallons it took to refill your tank, and this gas mileage calculator returns your actual MPG — a number that’s often different from the manufacturer’s rating once real-world driving conditions are factored in.
USA Gas Mileage Calculator
Calculate real-world MPG, fuel costs, and efficiency ratings across trips.
miles
gal
$
MPG
Trip Expense & Efficiency Projections
| Driving Distance | Fuel Consumption | Estimated Fuel Cost | Cost Per Mile |
|---|
One fill-up isn’t always representative, since driving conditions vary trip to trip. Our guide on checking your car’s real-world MPG explains how to track this over multiple fill-ups for a more reliable average.
Once you have a dependable MPG number, our fuel cost calculator turns it into an actual dollar estimate for your typical driving.