Bike Cadence and Speed Calculator

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Calculates bike speed based on cadence (pedal RPM), gear ratio, and wheel size.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Cadence (RPM), Gear Ratio (Front/Rear), and Wheel Diameter in the units shown.

Step 2

Read Wheel Circumference (Meters), Meters Per Minute, Speed (km/h), and Speed (mph) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Cadence (RPM): 80; Gear Ratio (Front/Rear): 2; Wheel Diameter: 700c (Road Bike)

Wheel Circumference (Meters): 2.12 m; Meters Per Minute: 339.2 m/min; Speed (km/h): 20.352 km/h; Speed (mph): 12.64614259 mph

Cadence (RPM): 95; Gear Ratio (Front/Rear): 2.5; Wheel Diameter: 700c (Road Bike)

Wheel Circumference (Meters): 2.12 m; Meters Per Minute: 503.5 m/min; Speed (km/h): 30.21 km/h; Speed (mph): 18.77161791 mph

Cadence (RPM): 60; Gear Ratio (Front/Rear): 1.5; Wheel Diameter: 26 inch (MTB)

Wheel Circumference (Meters): 2.32 m; Meters Per Minute: 208.8 m/min; Speed (km/h): 12.528 km/h; Speed (mph): 7.784535888 mph

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