Wind Turbine Power Output

Estimate the power and yearly energy of a wind turbine from wind speed and rotor diameter, free online.

Wind speed (m/s)

Rotor diameter (m)

Power coefficient Cp (max 0.593)

Air density (kg/m³)

Hours per year at about this wind speed

À propos de cette calculatrice

Power in the wind P = ½·ρ·A·v³ where A = π(D/2)². A turbine can capture at most 59.3% (Betz limit); real turbines achieve a power coefficient C_p of 0.35–0.45. Output rises with the cube of wind speed, so doubling wind speed gives 8× the power. Annual energy = output × the hours per year the wind blows at about that speed.