MPG Calculator
The MPG Calculator computes your vehicle's actual fuel economy based on miles driven and gallons of fuel used, so you can compare it to the EPA estimate.
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How This Tool Works
Fill your tank completely, reset your trip odometer, drive normally, then refill and note the gallons used and miles driven since the last fill-up.
Formula & Method
MPG = miles driven ÷ gallons of fuel used.
Example Calculation
Driving 350 miles and using 11.5 gallons of gas gives a real-world fuel economy of about 30.4 MPG.
Frequently Asked Questions
Why is my calculated MPG different from the EPA estimate?+
EPA estimates are based on standardized test conditions. Real-world MPG varies with driving style, terrain, weather, tire pressure, and vehicle load.
How can I improve my MPG?+
Maintaining proper tire pressure, avoiding aggressive acceleration, reducing excess weight, and keeping up with maintenance can all meaningfully improve fuel economy.
Should I calculate MPG over multiple tanks?+
Yes, averaging over several fill-ups gives a more reliable number than a single tank, which can be skewed by a mix of highway and city driving.
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