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Bike Cadence and Speed Calculator

Provided byBikeCalcbikecalc.com

BikeCalc’s Gear Calculator lets you enter chainring, sprocket, wheel, and crank parameters to compute speed from cade...

Screenshot of Bike Cadence and Speed Calculator on BikeCalc
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About this tool

What Bike Cadence and Speed Calculator does

BikeCalc's Gear Calculator lets cyclists compute speed from cadence or cadence from speed by entering chainring teeth, sprocket teeth, rim diameter, tire thickness, and crank length. The tool outputs gear ratio, gear inches, development meters, and gain ratio, then lets users adjust a cadence slider to see resulting speed. The site provides step-by-step instructions for each measurement and includes both metric and imperial conversion guidance. While the core calculator is free, the new website also showcases additional features alongside the classic tables that have been available since 2009.

Step by step

How to use the BikeCalc Bike Cadence and Speed Calculator

  1. 1

    Select the number of teeth on your front chainring using the chainrings picker

  2. 2

    Select the number of teeth on your rear sprocket using the sprockets picker

  3. 3

    Enter your rear tire thickness and rim diameter in the tire and rim fields

  4. 4

    Input your crank arm length or skip for basic gear calculations

  5. 5

    Drag the cadence slider or enter a speed value to compute the paired metric

Is it right for you

Best for

Cyclists who want a free, step‑by‑step gear calculator that explains how to measure tire and crank dimensions and shows multiple related metrics in one place.

Limitations

  • Results depend on accurate manual measurements of tire and crank size
  • No automatic unit switching between metric and imperial systems
  • Calculator focuses on gearing math rather than real‑time ride monitoring
Questions

Bike Cadence and Speed Calculator FAQ

Do I need to know my exact tire size to use the calculator?
Yes, entering the rear tire thickness and rim diameter is required for gear inches, development, and speed calculations; the site includes a guide for converting standard tire markings to the needed measurements.
Can I switch between metric and imperial units within the tool?
The calculator accepts millimeter and inch inputs, but the interface does not automatically convert between systems; you must select the measurement units you have on hand.
What is gain ratio and how is it different from gear inches?
Gain ratio accounts for crank length in addition to wheel size, providing a mechanical advantage measure that differs from gear inches which use only wheel diameter.
Is the calculator suitable for planning race gearing or just casual riding?
It can be used for both; the tool outputs gear ratio, gear inches, development, and gain ratio, which are standard metrics for evaluating gearing choices across different cycling disciplines.
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