Cadence to Speed Calculator — RPM to Road Speed
Convert your pedalling cadence to road speed for any gear combination.
700x25c = 2105mm, 700x28c = 2136mm
How We Calculate This
Speed from Cadence Formula
Speed = Cadence x Gear Ratio x Wheel Circumference x 60 / 1,000,000
Where:
- Gear Ratio = Chainring teeth / Sprocket teeth
- Wheel Circumference is in millimetres
- Speed is in km/h
Each pedal revolution advances the rear wheel by gear ratio turns. The distance per wheel turn equals the wheel circumference.
Frequently Asked Questions
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Last updated: 2025-02-20
All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.