Flex fuel ethanol calculator
Fuel
| Gasoline ethanol content % |
| E85 ethanol content % |
Vehicle
| Fuel tank size gallons |
| Current fuel level % |
| Desired fuel level % |
Ethanol
| Current ethanol content % |
| Desired ethanol content % |
| Fuel to add gallons |
Results
| E85 gallons |
| Gasoline gallons |
| Final ethanol % |
This calculates what blend of gasoline and E85 you need in order to get the right ethanol content in your tank.
Quick ratios
| Ethanol | Pump (E10) | E85 (E80) |
|---|---|---|
| 20% | 6 gallons | 1 gallon |
| 24% | 4 gallons | 1 gallon |
| 30% | 5 gallons | 2 gallons |
| 40% | 4 gallons | 3 gallons |
| 50% | 3 gallons | 4 gallons |