BikeCalc - Gear Calculator 4+

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 you're 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***