Calculate your cycling speed from watts, or the required power from your speed – ideal for training, time trials and track cycling. The calculator accounts for aerodynamic drag (cᵥA), rolling resistance (cᵣ) and gradient, with no wind.
Enter total mass, gradient, cᵥA and cᵣ, and choose the efficiency. Temperature, altitude and sea-level pressure are used to calculate air density. As a result you get speed or watts, plus a breakdown of forces and power share (aerodynamics, rolling resistance, gradient).