Hampton E85 Mix Calculator
by Daniel Hampton
Pay once $2.99 5.0 · 3 ratingsiPhone & iPad
About Hampton E85 Mix Calculator
Stop guessing at the pump. The Hampton E85 Calculator gives you the exact gallons of E85 and pump gas to add for any target ethanol blend — from E30 to E85.
Enter your tank size, current fuel level, and target mix
Read more
Get precise fill amounts instantly
See your estimated octane rating
Works offline, no signal needed at the pump
Fuel level helper estimates your tank from miles-to-empty
Adjustable ethanol and octane defaults for your region
Built by Hampton Tuning and real-world tested by enthusiasts. Whether you're on a flex fuel tune or dialing in a specific blend, this is the only tool you need at the pump.
How it charges
Pay once $2.99
Paid once — $2.99 — with no in-app purchases.
The store lists no in-app purchases.
Checked against the store listing on Oct 29, 2026. Something wrong? Tell us
