Use the Gas Mileage Calculator to save money on gasoline

2017-11-03T09:50:22+00:00Saving, Tools|

A gas mileage calculator can help you see if your car a gas guzzling machine. With fuel prices reaching all-time highs around the country, it’s important to know the mileage you’re getting and at what cost.

To help go the distance at less cost, I’ve created the Tool: Gas Mileage Calculator to help determine the gas consumption of your vehicle.

My hope is you will save money on gas by knowing your car’s gas mileage and consequently working towards becoming more efficient.

Use the Gas Mileage Calculator to determine:

  • Gas mileage in Miles per Gallon (USA).
  • Gas consumption in Litres per 100km (Canadian).
  • Cost per distance.

To use the Gas Mileage Calculator:

  1. Open the Gas Mileage Calculator.
  2. Under Distance Driven, enter how far you drove on a tank of gas. From the drop-down list, select distance in Miles or km.
  3. Under Gas Used, enter the quantity of fuel consumed. From the drop-down list, select Gallons or Litres as your preferred unit of measure.
  4. Under Price of Gas, enter the price you paid for gas. From the drop-down list, select $ per Gallon or $ per Litre.
  5. Click Calculate. The Results display the Gas Mileage and Cost per Distance in both USA and Canadian measures.

Example Data:
gas mileage calculator

Do the results surprise you? Do let me know what you think!


  1. Marci July 2, 2008 at 6:37 am

    Well, I do have to admit that it’s faster than doing it on
    the back of the gas receipt in the car driving down the road
    like I usually do 🙂

    But your figures matched mine – so I guess we
    both got it right! 🙂

  2. Kerry July 2, 2008 at 6:53 am

    @Marci Yay! Thank you for giving it a try! I usually write the mileage on my gas receipt and then deal with the math at home. 🙂

  3. Katie July 2, 2008 at 11:57 am

    how do I know how many gallons I used? I’ve never done this and am not sure waht # to put in this section, can you help?

  4. Kerry July 2, 2008 at 12:03 pm

    @Katie Great question! I’m so happy you asked. I usually look on the gas pump or on my receipt to get the number of gallons (or litres) I pumped into the tank. I then either write down this number or keep my receipt to do the math at home.

  5. This and That July 3, 2008 at 4:29 pm

    […] the Personal Finance Network: Squawkfox developed a nifty mileage calculator and put together a little video tutorial. Money Ning boils down all money management to a single […]

  6. Potato July 3, 2008 at 7:54 pm

    I usually write down my trip mileage (and reset the trip meter) each time I fill up, and enter the distance and fuel use data into the database at This is nicer for having metric units, and the cost of gas, but I like the signature with my average mileage too 🙂

  7. […] shows us a new tool she created to calculate gas costs, and if you want to know what the Fox sounds like, she made a little video tutorial. Just […]

  8. Sara July 4, 2008 at 5:36 pm

    I have a spreadsheet where I enter the information and it calculates my gas mileage and cost per mile for the tank of gas, as well as my cumulative gas mileage and cost per mile for the whole year!

  9. Mrs. Micah July 5, 2008 at 12:23 pm

    Awesome. 🙂 I think it’s so cool that you’re creating these tools. Something I’m looking forward to doing when I learn more.

  10. Kerry July 5, 2008 at 1:06 pm

    @Sara Your spreedsheet sounds wonderful. Are you shocked when you see the cumulative cost per mile?

    @Mrs.Micah I’m so happy you likey! These tools are lots of work, to be honest. I mostly build them out of interest in learning new technology, to solve a problem I have, and to share the results with others. It’s kinda fun when it’s done.

  11. Brian Ormerod February 28, 2009 at 12:42 pm

    Fox, The mileage calculator is flawed. It will not reset, and did not calculate when I was able to enter gasoline and mileage data. Hope you can get it working again

  12. Kerry February 28, 2009 at 8:18 pm

    @Brian Thank you for letting me know about this error. I’ve gone and fixed the flaw! 😀 Enjoy!

  13. ken klaver October 23, 2009 at 5:57 pm

    could we make a portable calculator for in the vehicle that just calculates gas mileage. i think it would sell in stores and would be great for people travelling.

  14. Brian Schuppert July 27, 2011 at 3:23 pm

    Kerry,…nice program. Under the gas used option could you add Imperial gallons as well for us Canadians? Cheers!

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