Ethanol Fuel Mixture Calculator
Use this calculator to detiremine how much gasoline and E85 ethanol to add to your gas tank to top it off to a desired ethanol precentage.
What’s In Your Gas Tank?
Tell us about how big your tank is and how much and what’s in there.
Tank Size (gals)
Fuel Level %
Fuel Ethanol %
What’s Your Desired Result?
Tell us about the E85 and Gasoline that you are using and what the ethanol percentage you want when the tank is full.
Desired Ethanol %
* Typical values are 30, 60, or 85 percent.
E85 Ethanol %
* E85 Ethanol content can vary.
Gas Ethanol %
* Most 91/93 fuel contains 10% ethanol.
Fuel Mixing Instructions
Fill out the form above and press CALCULATE to get your fuel mixing instructions.