MPG Comparison Calculator

The MPG comparison calculator puts two vehicles head to head so you can see, in real money, which one is cheaper to run. This miles per gallon calculator comparison tool takes each car's MPG, your annual mileage, and gas price, then computes the yearly fuel bill for both and the difference between them.

A few extra miles per gallon may look minor on paper, but over thousands of miles a year the gap adds up. This miles per gallon comparison calculator shows both the annual difference and the five-year difference, which is often the figure that matters when you're weighing a more efficient car against a higher purchase price.

Enter optional names for each vehicle to make the results easier to read, then your annual miles and local gas price. The calculator highlights the more efficient car and tells you how many MPG separates them. For a single-vehicle running cost, see our MPG Cost calculator; to project savings from switching, try Fuel Savings.

1. Optionally name Vehicle A and Vehicle B.
2. Enter each vehicle's MPG.
3. Enter your annual miles and the gas price.
4. Click Compare Vehicles (or press Enter).
5. See the annual cost of each, the difference, and which is more efficient.

Related tools: MPG Calculator, Fuel Savings Calculator, MPG Cost Calculator.