# e85Cal

> Calculates fuel mix for desired ethanol percentage. (iPhone/iPad app by Michael Joe.)

- Source: https://appshunter.io/ios/app/e85cal/id1470313135 (this page in markdown: same URL + `.md`)
- Developer: [Michael Joe](https://appshunter.io/developer/1132486512)
- Category: Utilities, Reference
- Price: Free
- Rating: 4.70/5 from 35 App Store ratings · 11 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.1 · 15 MB
- Languages: American English
- Released: 2019-07-02
- Data updated: 2026-07-23
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/e85cal/id1470313135/reviews.md

## What is e85Cal?

e85Cal help you calculate your ethanol percentage goal.

It fast, simple, and easy to use. Just enter the following information:

1) How big is your gas tank?
2) What is the ethanol % in the standard pump gas?
3) What is the ethanol % in the ethanol pump gas?
4) What is your target ethanol % mix goal?
5) What is your current ethanol % min in your vehicle?
6) What is your current fuel level % in your vehicle?

Results will display how many gallons or liters of standard and ethanol gas to pump in your vehicle based on your input.

## Key features

- Calculate ethanol percentage goal
- Enter gas tank size
- Input standard pump gas ethanol %
- Input ethanol pump gas ethanol %
- Set target ethanol % mix
- Enter current fuel level %

## Recent user reviews (10 of 11)

All indexed reviews: https://appshunter.io/ios/app/e85cal/id1470313135/reviews.md

### 5/5 — Pretty good

*2024-08-02*

I really like the fuel percentage feature on the app and seems very accurate because it includes the decimals unlike others. I hope there will be an option to change the screen to dark mode. Overall , i really like it. Thank you

### 5/5 — Great app but could use one simple improvement

*2024-06-16*

This app is definitely the best out there, thank you for making our lives easier. I am saying this as a recommendation for a small feature. I’m not sure if others have the same problem, but it would be nice to be able to set the target fuel amount in the tank.

Right now, the calculator gives you the number of gallons to add in order to get to a full tank. But for those that are racing competitively and maybe don’t want the added weight of a full tank, it would be nice to say, for example: “I want 1/2 full of a tank and I’m at 1/4, how much ethanol and pump gas do I need to add?”

Hopefully that make sense. Thanks!

### 5/5 — Fantastic!

*2023-02-12*

I’ve been using this for quite awhile now and it works great!  I guess the math doesn’t lie but I’m always surprised at how accurate to my target it is.

### 5/5 — App Enhancement

*2021-10-31*

This app is excellent. The best app that I have found. The layout is perfect to easily enter default information. The slide bar was a brilliant idea to enter the key variable whenever you go to fill up. Much quicker than typing in the % of fuel remaining in the tank.

Enhancement that would really finish/polish this app:
The E85 stations in my area (NJ) do not allow you to pump in a specific number of gallons. You have to enter the dollar amount of fuel that you want, and exactly that dollar amount is pumped into the tank.

So the current app forces me to exit and use the calculator app to multiply the number of gallons times the price per gallon.

A great enhancement would be to add default fields for the price per gallon of ethanol and of gasoline. Then in the calculated results show the gallons of ethanol needed along with its total cost. And do the same for gasoline results.

Hope that you will consider this enhancement. It would make your app the absolute easiest/quickest to use when pulling in to a station to fill up. Right now, I park on the side first to use the app and then the calculator app to have the total price before pulling up to the pump. Don’t want to be that jerk who isn’t prepared and takes forever while other people are waiting to get gas.

Thanks again!

### 5/5 — No lie

*2021-07-24*

Ima be honest i paid for 3 different and this is the easiest and best effective one for ios
So simple and effective can’t go wrong strongly recommend thanks for the creativity

### 5/5 — Great app

*2021-07-16*

Michale Joe, you sir have created the best e85 calculator on the market. Thank you !

### 2/5 — Intrusive ads

*2020-09-24*

Was a great app and I understand the developer needs to make money. I would rather have a pay to remove ads option. I support all developers who take the time to build a decent simple app.

### 1/5 — ?? Was a great app

*2020-08-30*

Used this app for weeks and now it’s not working?!?!?!?

As soon as you fix the app I will change my rating and review!

**Developer response:** Sorry to hear it's not working. What is not working? Maybe uninstall and reinstall the app?

### 5/5 — Loving it

*2020-04-09*

Good app... wrong device...

Please make this app for Android Devices

### 5/5 — Yes!

*2019-07-16*

Finally somebody gets it and delivers the perfect app for those of us looking for a quick way to get the exact mix of E85 and pump gas and addresses all the right variables.  Thank you!

## Frequently asked questions about e85Cal

### How does e85Cal help me calculate my ethanol percentage goal?

e85Cal guides you through entering your gas tank size, the ethanol percentage in standard and ethanol pump gas, your target ethanol mix, and your current fuel level. It then provides the exact gallons or liters of each fuel type to add.

### What information do I need to use e85Cal?

You will need to know your vehicle's gas tank size, the ethanol percentage of the regular and high-ethanol gas you have access to, your desired final ethanol percentage, and your current fuel level percentage.

### Is e85Cal available on Android devices?

Based on the provided information, e85Cal is currently supported on iPhone and iPod devices. Compatibility with Android devices is not specified.

### How often is e85Cal updated?

The latest version of e85Cal is 7.0, and it was last updated on February 21, 2026. This indicates a recent update and ongoing development for the application.

### What is the user rating for e85Cal?

e85Cal has a strong user rating of 4.7 stars, based on 35 ratings. This suggests a high level of user satisfaction with the app's functionality and ease of use.

### Does e85Cal have ads?

No, e85Cal does not contain advertisements. The application is free to use and does not display any ads to its users.

### What is the age rating for e85Cal?

e85Cal has an age rating of 4+. This means it is suitable for users of all ages, with no age restrictions.

### Can e85Cal calculate blends other than ethanol?

The description for e85Cal specifically focuses on calculating ethanol percentage goals. It is designed to help users determine the correct mix of standard and ethanol gasoline.

## Version history (last 5 releases)

### 7.0 — 2026-02-21

• Bug fixes

### 6.0 — 2025-03-25

• Bug fixes

### 5.2 — 2024-03-19

• Bug Fixes

### 5.1 — 2024-01-22

• Bug fixes

### 5.0 — 2023-12-30

• Bug fixes

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## More apps by Michael Joe

- [Randomize List](https://appshunter.io/ios/app/randomize-list/id1133053012)

All apps by Michael Joe: https://appshunter.io/developer/1132486512

## Related topics

[e85 calculator](https://appshunter.io/ios/topics/e85-calculator) · [e85 mix ethanol calculator](https://appshunter.io/ios/topics/e85-mix-ethanol-calculator) · [e85cal](https://appshunter.io/ios/topics/e85cal) · [e85 mix calculator](https://appshunter.io/ios/topics/e85-mix-calculator) · [ethanol calculator](https://appshunter.io/ios/topics/ethanol-calculator) · [ethanol](https://appshunter.io/ios/topics/ethanol) · [e85 stations usa](https://appshunter.io/ios/topics/e85-stations-usa) · [eflexfuel](https://appshunter.io/ios/topics/eflexfuel) · [e85](https://appshunter.io/ios/topics/e85) · [ethanol gas](https://appshunter.io/ios/topics/ethanol-gas) · [flex fuel](https://appshunter.io/ios/topics/flex-fuel)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-23.*