BikeCalc - Gear Calculator 4+

Gear calculator for cyclists

A. H. de Quatre Ltd.

    • Free
    • Offers In-App Purchases

iPhone Screenshots


Combining precise calculations and an intuitive design, BikeCalc provides you everything you need to analyze and optimize the gearing on your bicycle, saving you time, guesswork and potentially a costly mistake.

- Gear Ratios. BikeCalc offers a wide range of gear sizes for BMX, CX, MTB, road bikes, track bikes, fixies, recumbents and many more.

- Gear Inches. BikeCalc provides the customary gearing system still in use today by most English speaking countries.

- Development Meters. BikeCalc provides the metric based gearing system used by the UCI governing body for international competitive cycling events.

- Gain Ratios. BikeCalc supports the newest gearing system proposed by the renowned expert bicycle mechanic Sheldon Brown.

- Skid Patches. BikeCalc allows fixed gear riders who skid stop to extend the lifespan of their rear tire by increasing the number of skid patches.

- Tire Sizes. BikeCalc follows the ISO 5775 specifications and provides a convenient table to convert older tyre sizes.

BikeCalc makes it easy to optimize the gearing on your bicycle. You can also calculate your speed at a particular cadence for each gear. Plus, you can manage all your gearing configurations in one place. And there are articles helping you every step of the way.

- Find the gear that works for you. Make informed decisions about your bicycle gearing based on your needs.

- Calculate your speed at a given cadence. Plan your next assault and get ready to smash your Strava KOM/QOMs.

- Save more than one configuration. Keep track of all your configurations for different cycling disciplines and events.

- Share your gear configurations. Let your coach, teammates or cycling friends know what gearing you're on.

***The original gear calculator for cyclists***
***Trusted by 40,000+ cyclists every month***

What’s New

Version 4.1.0

Derailleur is now BikeCalc.

App Privacy

The developer, A. H. de Quatre Ltd., 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 Linked to You

The following data may be collected but it is not linked to your identity:

  • Purchases
  • Contact Info

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

You Might Also Like