Ethanol or gasoline: compare prices
Enter local prices per liter. The 70% rule is a rough reference, not a guarantee; your vehicle’s measured fuel economy is more useful.
Ethanol or gasoline: compare prices
Enter both prices; gasoline must be greater than zero.
How to use this tool
Ratio = ethanol price ÷ gasoline price. At 70% or less, the rough reference favors ethanol.
Example: 3.50 ÷ 5.00 = 70%, with both prices in the same currency.
Limits and cautions
The 70% rule is approximate, not a guarantee. Vehicle efficiency and route affect the result.
Processing and privacy
Calculations run in your browser; the values you enter are not sent to the server for this calculation.
Frequently asked questions
Does this rule work for every car?
No. Compare your vehicle’s measured fuel economy and typical route; this ratio is only a rough screening aid.