Bike Speed & Cadence Calculator
Calculate theoretical bike speed, cadence, gear ratio, and development from drivetrain geometry.
Primary result
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Selected gear by cadence
| Cadence | km/h | mph |
|---|
Cadence, gearing, and speed
Gear ratio equals chainring teeth ÷ rear cog teeth. Development equals wheel circumference × gear ratio, and speed equals development × cadence.
Calculating cadence
The reverse mode divides speed in meters per minute by development.
Required gear ratio
The ratio mode divides required distance per revolution by wheel circumference and estimates a compatible cog or chainring.
Theoretical vs actual speed
Measure the tire's loaded rollout for the best estimate. Keep Bike Gear Calculator for comparing a full multi-gear drivetrain.