Gas Mileage Calculator
Calculate your vehicle's fuel economy in miles per gallon from miles driven and gallons of fuel used.
Good
27.8 MPG is roughly above the typical gas-vehicle average — hybrids and small cars often land in the "Good" or "Excellent" zone.
About the Gas Mileage Calculator
This calculator works out your car's actual fuel economy from two numbers you can read off the pump and the odometer: how many miles you drove and how many gallons it took to fill back up. It's the simplest possible way to check your real MPG instead of relying on the EPA sticker rating.
Drivers use it right after a fill-up to track fuel economy over time, to see whether a recent oil change or a set of new tires changed anything, or to compare how a car performs on a highway-heavy trip versus routine city driving.
It's one division done in your browser — no trip logs, no account, nothing stored between visits unless you choose to write the number down yourself.
How it’s calculated
MPG is simply miles driven divided by gallons of fuel used to cover that distance. For a clean reading, fill the tank completely, reset your trip odometer (or note the mileage), drive normally, then fill up again and divide the miles by the gallons it took to fill it back to full.
Frequently asked questions
Why is my calculated MPG lower than the EPA rating on my car's window sticker?
EPA ratings are measured under controlled test conditions. Real-world driving — city traffic, cold starts, air conditioning, aggressive acceleration, hilly terrain — routinely brings actual MPG below the sticker number, sometimes by several miles per gallon.
How do I get an accurate reading?
Fill the tank completely and note the odometer reading, drive as you normally would, then fill up again to full and divide the miles driven by the gallons it took to refill. Filling only partially either time throws off the gallons number and skews the result.
Does one fill-up give a reliable number?
It's a reasonable snapshot, but MPG naturally varies fill to fill based on driving conditions. Tracking it over several fill-ups and averaging gives a more stable picture of your car's real fuel economy.
What counts as good gas mileage?
It depends heavily on vehicle type — a compact sedan averaging in the high 30s is doing well, a midsize SUV in the low-to-mid 20s is typical, and a hybrid can push well past 40 MPG. The gauge above compares your result against general gas-vehicle bands rather than a single fixed target.
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