Cycling Speed Calculator
Calculate bike speed from gear ratio, wheel circumference and cadence, or estimate speed from cycling power, weight, slope and wind.
Leave blank to use the reference table; measured rollout is more accurate for your tire.
Speed at different cadences
Same gear 50x15, wheel 700C x 25 (road)
| Cadence | Speed (km/h) | Time for 10 km |
|---|---|---|
| 60 rpm | 25.3 | 23:41 |
| 70 rpm | 29.6 | 20:18 |
| 80 rpm | 33.8 | 17:45 |
| 90 rpm | 38 | 15:47 |
| 100 rpm | 42.2 | 14:12 |
| 110 rpm | 46.4 | 12:55 |
Bike speed from cadence and gearing
English bike-speed intent splits into two common tasks: cadence and gear-ratio speed for drivetrain planning, and power-to-speed estimates for riding conditions.
C - wheel circumference.
Power mode limits
The power model is an estimate. Real speed also depends on tire choice, surface, wind gusts, body position, drivetrain efficiency and sensor accuracy.
Frequently Asked Questions
Sources and References
- Bicycle Gear CalculatorBikeCalc
- Tire Size > Wheel Circumference ChartWahoo Fitness Support
- Validation of a Mathematical Model for Road Cycling PowerPubMed
Calculations are based on the listed reference sources. Links open in a new tab.
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Estimate front and rear bike tire pressure in psi and bar from rider weight, bike weight, tire width, rim width, surface and tire type.