Free MPG Calculator
Calculate real-world fuel economy.
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About the MPG Calculator
Free MPG calculator. Enter the miles driven and the fuel used to work out your true miles per gallon, plus the equivalent L/100km and km/L. Track your real fuel economy.
How it works
- 1
Enter miles driven
Distance since the last fill-up.
- 2
Enter fuel used
Gallons or litres it took to refill.
- 3
See your economy
MPG and metric equivalents appear instantly.
Frequently asked questions
Fill your tank, reset the trip meter, then at the next fill-up note the miles driven and the gallons it took to refill. Enter both here.
Yes — it shows MPG alongside L/100km and km/L.