Estimation of speed in cycling

With the teeth number (front, rear) and the cadence (pedaling frequency), you can calculate your:
  • Gear ratio
  • Development (distance for one front chain wheel rotation)
  • Speed

Front: teeth
Rear: teeth
Cadence: rt/min
Circumference of rear wheel: m (ex: 2.10 for 700x23C)
Gear ratio:
Development: m
Speed: km/h

Design of the calculator