Wind Turbine Generator Equation Calculator

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Solving for wind power.
wind power equation
Scroll to the bottom to see typical input values for the variables.

Inputs:

air density (ρ)
rotor swept area (A)
coefficient of performance (Cp)
wind velocity (V)
generator efficiency (Ng)
gear box bearing efficiency (Nb)


Conversions:

air density (ρ)
= 0
= 0
kilogram/meter^3
rotor swept area (A)
= 0
= 0
meter^2
coefficient of performance (Cp)
= 0
= 0
wind velocity (V)
= 0
= 0
meter/second
generator efficiency (Ng)
= 0
= 0
gear box bearing efficiency (Nb)
= 0
= 0

Solution:

wind power (P)
= NOT CALCULATED

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Select to solve for a different unknown
wind power equationSolve for wind power.
wind power equation arranged to solve for air densitySolve for air density.
wind power equation arranged to solve for rotor swept areaSolve for swept area of the rotor, propeller or blades.
wind power equation arranged to solve for coefficient of performanceSolve for coefficient of performance.
wind power equation arranged to solve for wind speedSolve for wind speed.
wind power equation arranged to solve for generator efficiencySolve for generator or alternator efficiency.
wind power equation arranged to solve for gear box or bearing efficiencySolve for gear box bearing efficiency.
SymbolDescriptionTypical values
ρair density1.2 kg/m3 (sea level)
Cpperformance coefficient0.35 is typical
0.56 is the theoretical maximum known as the Betz limit.
Nggenerator efficiency50 percent to 80 percent.
Nbgearbox95 percent

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