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Calculate Your Percentage Increase in MPG

Enter your normal miles per gallon:

Enter your new miles per gallon:    

Calculate the percentage change: %

Calculate Your Projected Savings

Enter the amount you spend on fuel every week: $
Calculate the projected savings in Dollars:


Percent Weekly savings Yearly savings
10% $ $
20% $ $
30% $ $
40% $ $
50% $ $


Additives & Fuel Calculator

Several years ago, I created a calculator to track my Miles Per Gallon (MPG). I have since added Acetone and Xylene Additives to it. The program runs from a Microsoft Office Excel Spreadsheet. Not everyone will be able to use this but those that can will find it useful. The calculations, I must say, really put my math to the test.
The way the calculator works:
Change the "Red" text fields to your values and then click "Calculate". Leave the other fields alone; unless you know what you are doing, you could screw up the formulas.
  • .Enter your Miles Driven, Gallons Used, Price you paid per gallon, Old MPG and click Calculate. The program will then do its thing.
  • The little red triangles contain notes. Mouse over them to see the note. (Excel version only)
  • You can use the Trip Miles - to determine how much it will cost to drive, lets say, 1000 miles.

There is a section for Additives; Acetone & Xylene. It will tell you how much of these additives to add based on the fuel you just purchased.

  • Enter the number ounces you use per 10 gallons of fuel.
  • Enter the price you paid for the additive.
  • Enter the number of ounces in the can of additives.
  • It will calculate the number of treatments, cost of each treatment, cost per ounce of treatment, and a lot of other things.

Click on one of the following to run the calculator:

Web Page   |   Excel   |   Open Office


"You may have to Save the file to your PC then open it in Microsoft Works Spreadsheets or Excel"

Open Office is Free to Download and Use. It mirrors Microsoft Office 


OnLine MPG Calculator:  http://www.milesgallon.com/?miles=250&gallons=7&price=2.59




Page Last Edited - 04/03/2022