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BikeCalc gets a redesign and a new app for its 15th year anniversary! Access the old tables here.
BikeCalc
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.
BikeCalc offers a wide range of gear sizes for BMX, CX, MTB, road bikes, track bikes, fixies, recumbents and many more.
BikeCalc provides the customary gearing system still in use today by most English speaking countries.
BikeCalc provides the metric based gearing system used by the UCI governing body for international competitive cycling events.
BikeCalc supports the gearing system proposed by the renowned expert bicycle mechanic Sheldon Brown.
BikeCalc allows fixed gear cyclists who skid stop to extend the lifespan of their rear tire by increasing the number of patches.
BikeCalc allows cyclists who ride single speed bikes to calculate the ideal length of chain that can fit on their chainstay.
BikeCalc lets cyclists anticipate the speed they can reach on their bicycle at a given cadence in kilometers and miles per hour.
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.
Make informed decisions about your bicycle gearing based on your needs.
Build your custom cassette from scratch with professional charts and visual indicators.
Weight out even-handed options with convenient color coded tables.
Plan your next assault and get ready to smash your Strava KOM/QOMs.
Browse components from Shimano, Continental, and many more to come.
Keep track of all your configurations for different cycling disciplines and events.
Let your coach, teammates or cycling friends know what gearing you're using.
Ditch the old ambiguous sizing systems for the newer more reliable industry standard.
Quickly reference the gearing tables you frequently rely on.
Keep everything relevant by creating folders and assigning appropriate tags.
Find what you need quickly or pick a query from your history.
Enable biometric authentication to access your recently deleted configurations.
Create and run shortcuts with Siri, the Shortcuts app or Siri Suggestions.
Swipe down from the middle of the home screen to start a search.
Put forward for consideration any missing components using the in-app forms.
Reach out for help or send feedback using the contact form.
Visit our short articles answering common questions from the community.
Reduce eye strain in low-light environments and minimize blue light exposure.
Leave your review here.
"I downloaded the update earlier this week! It's fantastic - the animation of the crank/wheel is absolutely delightful! It's the best visual guide to the effects of different gearing I've ever seen for sure. I'll send it round the office!"
"I've been using the website for the past ten years and I'm extremely stocked to have the new app on my phone! It's the only gear calculator I trust with the correct maths. Thank you for keeping it alive all these years!"
"I'm very new to cycling and this app has been super helpful! What I really love about it is how easy it is to use. Not to mention the articles explaining how it all works - particularly the one about different tire sizes. Five stars!"
"This app is a total game changer for me! Wish I knew of its existence earlier, it's now become an essential part of my cycling toolkit. It's simple, yet effective, but also looks great. Highly recommend for any bicycle project!"
No commitments, cancel anytime.
BikeCalc
Free
Discover the basics of BikeCalc
free forever with no commitments.
Calculate gear ratios, gear inches, development meters & gain ratios
Count skid patches & chain links
Measure speed & cadence
Available on iOS and web
BikeCalc+
$3.99/mo.
Unlock access to all features
with the BikeCalc+ subscription.
Calculate gear ratios, gear inches, development meters & gain ratios
Count skid patches & chain links
Measure speed & cadence
Convert tire sizes to ISO 5775
Browse Shimano components
Create & export an unlimited amount of configurations
Available on iOS
No ads
More questions? Contact us here.
What is BikeCalc?
BikeCalc allows cyclists to analyze and optimize the gearing on their bicycle. Designed to be the easiest-to-use app for calculating different gearing systems, BikeCalc combines precise calculations with an intuitive design so that cyclists can effortlessly fine-tune their bicycle's performance to suit their individual needs.
What is BikeCalc+?
BikeCalc+ is a subscription service combining everything you love about BikeCalc, plus even more powerful features. When you upgrade to BikeCalc+ not only will you gain access to the full experience, but you'll also be supporting a free independent website made by cyclists.
Does it work offline?
For the most part yes. The iOS app can be used offline for all core functionalities, however some features like making a purchase and contacting support will require internet connection.
What is a BKC file?
BKC is a file format being developed by BikeCalc to facilitate sharing configurations between users of the app. Currently in beta — it has a file name extension '.bkc' and is sharable only by email.
How much does it cost?
That depends on which plan you choose. BikeCalc has a free tier so you can discover the basic functionalities. BikeCalc+ is the pro tier unlocking all features at $3.99 per month.
What is in the pro plan?
Everyone on the free plan get to save one configuration for free. You can upgrade to BikeCalc+ at any time for more configurations.
Where can I download it?
BikeCalc is available to download for iPhone on the App Store. To get the newest features, make sure your device is running the latest software versions.