Gear & Engine Calculator 4+

Ratio,Tire,Flow Rate & Airflow

Verosocial Studio

Designed for iPad

    • 3.0 • 2 Ratings
    • $0.99



Utility for gear ratio and other helpful calculations.

The Gear and Engine Calculators app is a very useful utility to give an estimate of vehicle’s (car, truck, motorcycle) gear ratio. Calculators are included and additionally supplied are helpful converters.


- Gear Ratio

- Gear Selector

- Air Filter Height

- Ring and Pinion Ratio


- Tire Size

- Flow Rate

- Pressure Units

- Airflow Converter

- Temperature Conversion

Area Converters

• Square Inches and Shorter Conversion
• Square Feet & Yards & Meters Conversion

Distance Converters

• Inches & Centimeters & Millimeters Conversion
• Feet & Yards & Meters Conversion
• Nautical Miles, Statue Miles and Kilometers Conversion

Volume Converters

• US/Imperial to Metric Units Conversion
• Metric to US/Imperial Units Conversion
• Inches & Centimeters Volume Conversion
• Feet, Yards, & Meters Volume Conversion

This app features:

• Send your calculations or conversion by email
• Universal App (iPhone, iPod Touch, and iPad)
• Retina Display graphics
• Fast app switching
• Automatically Saves Your Inputs
• All iPhone screen are supported

No network connectivity required.

The application is a universal app compatible with the iPhone, iPod Touch, and the iPad.

What’s New

Version 7.4

Bug fixes to prevent crashing

Ratings and Reviews

3.0 out of 5
2 Ratings

2 Ratings

Brasshandle ,

Great app for engines

Useful toolkit

Rlpjr ,

Frozen app

I opened this app one time when I bought it. The next time i opened the app I could no longer switch between different calculators in this app now I can't use this app at all.

Bobbyf21 ,


Disappointed. There should be a means by which to enter a final gear ratio other than 1:1. Every vehicle on the road today has an overdrive transmission. It would certainly help if this app would permit the entry of the overdrive gear ratios to accurately calculate engine rpm, rpm at vehicle speed, etc.

App Privacy

The developer, Verosocial Studio, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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