Wind Turbine Power Calculator
Estimate wind power and turbine output at a given wind speed.
Use wind speed at approximately the turbine hub or rotor height.
Typical turbine performance varies by design and wind speed. The theoretical Betz limit is 59.3%.
Represents generator, electrical, drivetrain and other conversion losses.
Advanced
1.225 kg/m³ is the standard sea-level value at approximately 15°C.
Estimated Turbine Output
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Swept Area
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Available Wind Power
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Rotor Power
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Overall Efficiency
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Method:
Available wind power is calculated as
P = ½ × ρ × A × v³,
where ρ is air density, A is rotor swept area and v is wind speed.
For a horizontal-axis turbine: A = πD² / 4. For a vertical-axis turbine: A = D × H.
Estimated output = Available wind power × Cp × (1 − system losses).
This calculator estimates power at a single entered wind speed. Actual turbine output should be determined from the manufacturer’s power curve because Cp, generator efficiency, cut-in speed, rated power and control behaviour vary with wind speed.
For a horizontal-axis turbine: A = πD² / 4. For a vertical-axis turbine: A = D × H.
Estimated output = Available wind power × Cp × (1 − system losses).
This calculator estimates power at a single entered wind speed. Actual turbine output should be determined from the manufacturer’s power curve because Cp, generator efficiency, cut-in speed, rated power and control behaviour vary with wind speed.