Bicycle Gear Ratio
Calculate Bicycle Gear Ratio instantly with the exact formula and a worked example.
Bicycle Gear Ratio
Chainring teeth
Rear cog teeth
Wheel circumferencemm
Cadencerpm
Gear ratio
3.3333
Distance per pedal revolution
7.02m
Speed at given cadence
37.9km/h
More about: Bicycle Gear Ratio
What it calculates
The “Bicycle Gear Ratio” calculator computes Gear ratio from 4 parameters: chainring teeth, rear cog teeth, wheel circumference (mm), cadence (rpm).
A study aid and exam-prep helper.
Example calculation
With parameters Chainring teeth = 50, Rear cog teeth = 15, Wheel circumference = 2,105 mm, Cadence = 90 rpm the result is 3.33.
How to use
- Enter chainring teeth, rear cog teeth, wheel circumference and cadence — each field above is adjustable with a slider.
- Gear ratio is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
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FAQ
How is Bicycle Gear Ratio calculated?
The Bicycle Gear Ratio calculator computes Gear ratio from chainring teeth, rear cog teeth, wheel circumference, cadence. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Bicycle Gear Ratio calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
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