BikeCalc gets a redesign and a new app for its 15th year anniversary! Access the old table here.


25 mm
622 mm

Similar Speeds

(x: Chainring, y: Sprocket)

More ±%
0 r/min


Measurement System


Learn how to use the original and most popular speed calculator for cyclists

The following instructions aim to assist you in effectively using our speed calculator, ensuring a more seamless and informed experience.

  1. Count the number of teeth on the front cog of your bicycle, and select this value in the picker labeled chainring.
  2. Do the same on your rear cog for the picker labeled sprocket.
  3. Measure in millimeters the thickness of your rear tire across its tread when inflated, and select this value in the picker labeled tire thickness.
  4. Do the same with the diameter of your rim up to its bead for the picker labeled rim diameter. Sometimes, a marking can also be found printed on the sidewall of the tire. If you're measuring in inches, please refer to our article explaining how to convert tire sizes to the international standard (ISO 5775).
  5. Drag the slider horizontally to select a value for the field labeled cadence.

Note: Selecting the metric value in the picker labeled measurement system will convert the speed to kilometers per hour (km/h), whereas selecting imperial will instead convert to miles per hour (mi/h).

For more information, please visit our articles answering common questions from the community.