Learn how to use the original and most popular bicycle gear calculator for cyclists on the internet since 2009

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

How to calculate gear ratios?

1. Count the number of teeth on the front cog of your bicycle, and select this value in the picker labeled chainrings teeth.
2. Then do the same on your rear cog for the picker labeled sprockets teeth.

How to calculate gear inches?

1. Follow the steps to calculate the gear ratio.
2. Measure in millimeters the thickness of your rear tire across its tread when inflated, and select this value in the picker labeled tire thickness.
3. Then do the same with the diameter of your rim up to its bead for the picker labeled rim diameter. If you're measuring in inches, please refer to our article explaining how to convert tire sizes to the international standard (ISO 5775).

How to calculate development meters?

1. Follow the same procedure as when calculating gear inches with tire and rim sizes measured in millimeters. Sometimes, a marking can also be found printed on the sidewall of the tire. If in doubt, please refer to our article explaining how these tire markings are designated.

How to calculate gain ratios?

1. Follow the steps to calculate development meters.
2. Measure in millimeters the length of your crank arm from the center of its pedal to the center of your bottom bracket, and select this value in the picker labeled crank arms length. Sometimes, a marking can also be found engraved on the interior of the arms.

How to calculate skid patches?

1. Follow the steps to calculate the gear ratio.
2. If you ride a fixed gear bike and you can skid with either foot forward, then turn on the switch labeled ambidextrous skids in your profile settings.

How to calculate chain links?

1. Follow the steps to calculate the gear ratio.
2. If you ride a single speed bike, measure in millimeters the length of your chainstay from the center of your bottom bracket to the desired position on your horizontal dropouts, and select this value in the picker labeled chainstay length.

How to calculate speeds?

1. Follow the steps to calculate development meters.
2. Drag the slider horizontally to select a value for the field labeled cadence.

How to calculate cadences?

1. Follow the steps to calculate development meters.
2. Drag the slider horizontally to select a value for the field labeled speed.

How to access calculators for track bikes?

Selecting a single chainring and a single sprocket will show additional analysis such as skid patches, chain links, and cadences.

Does BikeCalc provide more learning materials?

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