BikeCalc - Gear Calculator app for iPhone and iPad

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.



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.

- 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 youre on.

- Organise 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.

- 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.



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