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E85 Blend Calculator
Calculate the ideal blend to hit your target ethanol content.
Calculate the final ethanol content after adding specific amounts of fuel.
Mode 1: Find Mix
Mode 2: Check Final %
Car Model:
Select your car to auto-fill tank size.
Tank Size ({unit}):
Total fuel tank capacity of your car.
Fuel Left in Tank (%):
Percentage of fuel currently remaining in your tank.
10
%
Fuel Currently in Tank:
The fuel currently sitting in your tank and its true ethanol %. Pick a preset or enter a custom value.
Base Fuel (to add):
The base (lower-ethanol) fuel you will add — e.g. E20, Gasohol95, 91/93, E10. Pick a preset then adjust the true ethanol % if needed.
Blend Fuel (to mix in):
The high-ethanol fuel you will blend in — e.g. E85 or Ethanol 99%. Pick a preset then adjust the true ethanol % if needed.
Target Ethanol Content (%):
Your desired ethanol % after mixing. Pick a preset (E20/E30/E40/…) or enter a custom value.
Calculate
Results:
Combinations of blend fuel and base fuel you can add to hit your target ethanol. Every row fits within your tank capacity.
Total Fuel
Base Fuel (to add):
The base (lower-ethanol) fuel you will add — e.g. E20, Gasohol95, 91/93, E10. Pick a preset then adjust the true ethanol % if needed.
Blend Fuel (to mix in):
The high-ethanol fuel you will blend in — e.g. E85 or Ethanol 99%. Pick a preset then adjust the true ethanol % if needed.
Add Base Fuel ({unit}):
Amount of base fuel you will add.
Add Blend Fuel ({unit}):
Amount of blend fuel you will add.
Calculate
Results:
Your final ethanol % after adding the base and blend fuel to the fuel already in your tank.
0%
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