# E85 Calculator

> Calculate precise E85 and gasoline fuel mixtures for vehicles. (iPhone/iPad app by Sheharyar Irfan.)

- Source: https://appshunter.io/ios/app/e85-calculator/id1029273167 (this page in markdown: same URL + `.md`)
- Developer: [Sheharyar Irfan](https://appshunter.io/developer/974971911)
- Category: Utilities, Education
- Price: Free (on sale, was $1.99)
- Rating: 1.00/5 from 2 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 3 MB
- Languages: American English
- Released: 2015-09-19
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/e85-calculator/id1029273167/reviews.md

## What is E85 Calculator?

E85 Calculator is your essential tool for precision fuel mixing, designed for performance enthusiasts and flex-fuel vehicle owners.

KEY FEATURES:
- Calculate exact amounts of E85 and gasoline needed
- Target specific ethanol percentages (E30, E50, E70, E85)
- Calculate by desired octane rating
- Support for both metric (liters) and imperial (gallons) units
- Real-time calculations with instant updates
- Easy and advanced modes for different user needs

EASY MODE:
- Quick presets for common ethanol targets
- Simple tank size selection
- Intuitive slider controls for current fuel level
- Basic inputs for everyday use

ADVANCED MODE:
- Precise control over fuel properties
- Custom octane ratings input
- Detailed ethanol content adjustment
- Advanced fuel mixing calculations

Perfect for:
- Flex-fuel vehicle owners
- Performance car enthusiasts
- Race car tuners
- Anyone mixing E85 with regular gas

Get accurate calculations every time and achieve the perfect fuel blend for your vehicle's needs. Whether you're targeting a specific ethanol percentage or octane rating, E85 Calculator provides the precise measurements you need.

Safe, simple, and accurate - take the guesswork out of fuel mixing with E85 Calculator.

## Key features

- Calculate E85 and gasoline amounts
- Target specific ethanol percentages
- Calculate by desired octane rating
- Metric and imperial unit support
- Real-time calculations
- Easy and advanced modes

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/e85-calculator/id1029273167/reviews.md

### 1/5 — Math ain’t mathin’

*2025-03-10*

Extremely inaccurate.

### 1/5 — Calculator Is WAYYY OFF

*2025-03-07*

Don’t use this calculator it is wayyyyy off.

### 1/5 — Junk

*2022-10-09*

Display is poorly laid out.  Boxes are included to Calc 93 or E required to achieve proper E level.  Problem is screen content bleeds into each other.  

Look around for better free apps that actually work.

### 1/5 — Version Update Issue

*2020-04-25*

I updated to the newly released version and now the App will no longer run on my iPhone 7

### 2/5 — Needs work

*2019-04-22*

I can’t see though my tank and measure how many gallons are remaining in my tank. Needs to be simplified to tell me how many gallons I need to add to my tank to get desired octane.

### 2/5 — App works great but needs a save feature

*2019-01-04*

A year ago the developer said there was an update coming out to save custom settings. Still needs that update. For a paid app there should be support.

### 3/5 — Needs save certain fields.

*2018-03-27*

You said it was coming almost a year ago. Thanks.

### 5/5 — Love the app. Just wish one thing.

*2017-03-26*

Terrific app!!! 

Only wish there was a "save custom settings" feature, so those of us with custom tunes can save the percentage of Ethanol we run. 

Fyi. Arizona only has E54 now. I'd like to set that at default as well as my tank size and desired E%, when I mix.

**Developer response:** Thanks for using the E85 app. An update is coming soon to save custom settings.

### 4/5 — Needs settings for default button.

*2017-03-23, version 1.0.1*

Great app, but should be able to save defaults for user since not all stations are 91 octane. Also, saving tank size would be nice.

### 5/5 — Spot on

*2016-08-10*

Not going to lie it took a bit to get use to but once u get it down it's a life saver for people who have a fuel percentage slot on their car/tuner. Cross checked it with some other online e85 calculators and it's pot on 👌

## Frequently asked questions about E85 Calculator

### What is E85 Calculator used for?

E85 Calculator is used to precisely determine the exact quantities of E85 and gasoline required to achieve a desired ethanol percentage or octane rating for your vehicle's fuel blend.

### Does E85 Calculator support different units?

Yes, E85 Calculator supports both metric (liters) and imperial (gallons) units, making it versatile for users worldwide.

### Can I target specific ethanol percentages with E85 Calculator?

Absolutely. E85 Calculator allows you to target specific ethanol percentages such as E30, E50, E70, and E85, ensuring you get the exact blend you need.

### What are the different modes in E85 Calculator?

E85 Calculator offers an Easy Mode for quick presets and simple inputs, and an Advanced Mode for precise control over fuel properties, custom octane ratings, and detailed mixing calculations.

### Is E85 Calculator available on multiple devices?

E85 Calculator is available for iPhone and iPad, providing a convenient tool for Apple device users.

### How often is E85 Calculator updated?

The latest version, 2.0.1, was released on February 20, 2025, indicating active development and updates for the application.

### What is the user rating for E85 Calculator?

E85 Calculator has a rating of 1.0 stars from 2 ratings. This indicates a very small number of reviews with a low average score.

### Does E85 Calculator have ads?

No, E85 Calculator does not contain advertisements, offering an uninterrupted user experience.

## Version history (last 5 releases)

### 2.0.1 — 2025-02-20

Major Update: International Edition! 

Now Supporting 12 Languages:
1. English
2. Simplified Chinese (简体中文)
3. Traditional Chinese (繁體中文)
4. Japanese (日本語)
5. Korean (한국어)
6. French (Français)
7. Spanish (Español)
8. Arabic (العربية)
9. Italian (Italiano)
10. Brazilian Portuguese (Português)
11. Russian (Русский)
12. German (Deutsch)

Key Improvements:
• Automatic language detection based on your device settings
• Localized measurement systems (metric/imperial) for each region
• Properly formatted numbers and units for all languages
• Right-to-left (RTL) support for Arabic users
• Localized fuel octane ratings and ethanol content displays
• Region-specific Chinese variants (Simplified/Traditional)
• All technical terms and measurements localized for accuracy

Everything is now fully localized:
• User interface elements
• Measurement units
• Fuel properties
• Tank configurations
• Help and documentation
• Error messages
• Preset values

The E85 Calculator now speaks your language! Calculate precise ethanol fuel blends with a fully localized experience, from units to fuel properties, all in your preferred language.

Thank you for your continued support! If you enjoy using the app, please leave a review.

### 2.0.0 — 2024-11-15

New in this update:
- Completely redesigned user interface
- New advanced mode for precise calculations
- Added metric/imperial unit toggle
- Real-time calculation updates
- Improved accuracy for all calculations
- Added haptic feedback for better user experience
- Fresh new green theme
- Performance improvements and bug fixes

### 1.1.0 — 2020-04-20

- Support for All iPhone Sizes
- Added iPad Support
- Dark Mode support added
- Ability to save your last result

### 1.0.1 — 2015-10-22

Fixed the % Filled Text field where the input was from the unit amount from tank capacity.

### 1 — 2015-09-19

No release notes.

## Apps similar to E85 Calculator

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Mix it E85](https://appshunter.io/ios/app/mix-it-e85/id6749247734) | 3.0 (2) | Free | Utilities |
| [CANBOXPRO](https://appshunter.io/ios/app/canboxpro/id6473891966) | 3.0 (2) | Free | Utilities |
| [e85Cal](https://appshunter.io/ios/app/e85cal/id1470313135) | 4.7 (35) | Free | Utilities |
| [Calc Mix Etanol](https://appshunter.io/ios/app/calc-mix-etanol/id6449916400) | — | Free | Utilities |
| [APR PCU](https://appshunter.io/ios/app/apr-pcu/id6462687757) | — | Free | Utilities |
| [E85 App](https://appshunter.io/ios/app/e85-app/id1508517906) | 3.8 (11) | Free | Utilities |

## More apps by Sheharyar Irfan

- [Flagger](https://appshunter.io/ios/app/flagger/id6737427924)
- [Air Power](https://appshunter.io/ios/app/air-power/id6755638839)
- [DragCalc](https://appshunter.io/ios/app/dragcalc/id6758584657)

All apps by Sheharyar Irfan: https://appshunter.io/developer/974971911

## Related topics

[e85 calculator](https://appshunter.io/ios/topics/e85-calculator) · [e85 mix calculator](https://appshunter.io/ios/topics/e85-mix-calculator)

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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 2026-06-11.*