Calculate miles per gallon, cost per mile, and projected monthly and annual fuel costs.
What it means
EPA window-sticker MPG is a lab number. Real-world MPG is what actually depletes your wallet, and it varies with terrain, traffic, AC use, and how aggressively you drive. Always trust your own tank-to-tank math over the sticker.
One tank can be misleading — long highway runs inflate MPG and short cold-weather trips deflate it. Average 3–5 tanks for a useful baseline.
FAQ
Fill up to the same click-off point. Reset the trip odometer. Drive normally. At the next fill, record miles and gallons. Divide miles by gallons.
Yes. Aggressive driving (rapid acceleration, hard braking) can cut highway MPG 15–30% and city MPG 10–40%. Cruise control on highways often adds 5–10%.
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