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Calcimator

Wind Turbine Output Calculator

Calculate annual energy production from wind turbine specs and wind speed.

Inputs

ft
m/s
kg/m³
%
%

Results

Average Power

422.41 kW

≈ 28 homes' peak draw

Annual Production

3,515,263 kWh

≈ 325 homes' yearly electricity

Daily Production9,630.9 kWh
Swept Area5,026.5 m²
How to Use This Calculator
  1. Enter the turbine's rated power in kW and rotor diameter in meters.
  2. Input the average wind speed at hub height.
  3. Set the air density at the site.
  4. Review the estimated annual energy output in MWh and capacity factor.
  5. Adjust for array wake losses (typically 5–15%) when calculating farm-level output.

How the result changes with Average Wind Speed

Average Wind SpeedAverage PowerAnnual Production
3.448.4 kW402,810 kWh
9.41,022.87 kW8,512,306 kWh
176,050.38 kW50,351,268 kWh
2314,983.71 kW124,694,460 kWh

What each input means

Rotor Diameter
Diameter of the turbine rotor in meters.
Average Wind Speed
Mean annual wind speed at hub height.
Air Density
Air density at your elevation (1.225 at sea level).
Turbine Efficiency (Cp)
Power coefficient of the turbine. Betz limit is 59.3%.
Availability
Percentage of time the turbine is operational.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Rotor Diameter = 80, Average Wind Speed = 7, Air Density = 1.225, Turbine Efficiency (Cp) = 40 = 5 input(s) provided
  2. Calculate Average Power
    Average Power
    422.41 = 422.41
  3. Calculate Annual Production
    Annual Production
    3515263 = 3515263
  4. Calculate Daily Production
    Daily Production
    9630.9 = 9630.9
  5. Calculate Swept Area
    Swept Area
    5026.5 = 5026.5

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