Quick guide
Try an example
You enter
- Front chainring teeth
48
- Rear sprocket teeth
16
- Wheel circumference (m)
2.1
- Cadence (rpm)
90
You get
- Gear ratio
3
- Distance per pedal turn (m)
6.3
- Speed (km/h)
34.02
How it works and limits
Enter front and rear tooth counts, the measured wheel circumference and cadence. The calculation assumes the wheel rolls without slipping.