Precision Bicycle Calculators for Every Ride

Free, accurate tools for chain length, tire pressure, e-bike range, and gear ratios. Available on the web and Android.

Instant Web Tools

Calculate your exact chain length, tire pressure, gear ratios, and e-bike range right from your browser. Completely free!

Ditch the guesswork. Built for cyclists, the tools use exact metric inputs to ensure proper results for a better riding experience.

Take your toolkit to an another level. Download the mobile version for lightning-fast calculations that never require an internet connection.

This project is fully built by a cyclist. It is a way to thank the cycling community, and you know the tools are fro someone who understand things.