Estimation of speed in cycling

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

Front: teeth
Rear: teeth
Cadence: rt/min
Circumference of wheel: m (*)
Gear ratio:
Development: m
Speed: km/h

(*) The circumference of the rear wheel must be measured under load (development of one wheel spin with the cyclist on the bike).

Design of the calculator