BikeCalc - Gear Calculator

***The original gear calculator for cyclists made by cyclists***

***Trusted by 300,000+ cyclists worldwide***

BikeCalc makes it easy to optimize the gearing on your bicycle. You can also calculate your speed at a given 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.

- Take full control of your bicycle

Build your custom cassette from scratch with professional charts and visual indicators.

- Compare similar gear combinations

Weight out even-handed options with convenient color coded tables.

- Calculate your speed at a given cadence

Plan your next assault and get ready to smash your Strava KOM/QOMs.

- Create configurations from real components

Browse components from Shimano, Continental, and many more to come.

- Save more than one configuration

Keep track of all your configurations for different cycling disciplines and events.

- Share and export your gear configurations

Let your coach, teammates or cycling friends know what gearing you're using.

- Convert tire sizes to ISO 5775

Ditch the old ambiguous sizing systems for the newer more reliable industry standard.

- Add widgets to your home screen

Quickly reference the gearing tables you frequently rely on.

- Organize your various sets of configurations

Keep everything relevant by creating folders and assigning appropriate tags.

- Search with predictive text

Find what you need quickly or pick a query from your history.

- Protect your data with privacy features

Enable biometric authentication to access your recently deleted configurations.

- Improve your experience with automations

Create and run shortcuts with Siri, the Shortcuts app or Siri Suggestions.

- Access app content from Spotlight

Swipe down from the middle of the home screen to start a search.

- Suggest adding components to the database

Put forward for consideration any missing components using the in-app forms.

- Contact us from the app

Reach out for help or send feedback using the contact form.

- Learn more about bicycle gearing

Visit our short articles answering common questions from the community.

- Enable dark mode from Settings

Reduce eye strain in low-light environments and minimize blue light exposure.

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 cyclists who skid stop to extend the lifespan of their rear tire by increasing the number of patches.

- Chain Links

BikeCalc allows cyclists who ride single speed bikes to calculate the ideal length of chain that can fit on their chainstay.

- Speeds

BikeCalc lets cyclists anticipate the speed they can reach on their bicycle at a given cadence in kilometers and miles per hour.

- Tire Sizes

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