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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

Last updated: 2025-02-20

All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.