MPG Calculator
Calculate miles per gallon, gallons per 100 miles, cost per mile, and miles per dollar.
Miles per Gallon
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Gallons per 100 Miles
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Cost per Mile
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Miles per Dollar
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Guide
How it works
Use this calculator to calculate miles per gallon from miles driven and gallons used.
What this calculator does
The MPG calculator estimates miles per gallon, gallons per 100 miles, cost per mile, and miles per dollar.
Formula
MPG = miles driven / gallons used
Cost per mile = gallons used x fuel price / miles driven
How to use it
Enter miles driven, gallons used, and the fuel price per gallon.
Common mistakes
- not filling the tank to the same level
- mixing city and highway trips without noting the difference
- using estimated gallons instead of receipt gallons
FAQs
Is MPG the same for every trip?
No. Speed, traffic, temperature, load, tires, and driving style can all change fuel economy.
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