Cycling Power Calculator
Find the watts required for your cycling speed and gradient.
Result
How to use
- Enter your values in the fields above.
- Press Calculate to see your result instantly.
- Use the Share button to copy a link to your result.
About this calculator
This calculator estimates the power (watts) a cyclist must produce to hold a given speed, by summing the three main resistive forces: rolling resistance (from tire/road friction and rider+bike weight), gravity (from the road gradient), and aerodynamic drag (proportional to the square of speed, scaled by frontal area and drag coefficient CdA).
Cyclists and coaches use it to translate a target speed or finish time into a required power output for pacing a climb or time trial, to compare how much extra power steep gradients demand, and to see how much aerodynamic position (lower CdA) or lighter equipment can save. Enter your speed, gradient, weight, and rolling/aero parameters to get the watts required.
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