Wind Turbine Calculator

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Calculates the power output, efficiency, RPM, torque, and estimated revenue of a wind turbine based on various input parameters.

More tools:Science & Lab Calculators

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Blade Length (meters), Wind Speed (m/s), Air Density (kg/m³), Turbine Efficiency (%), Gearbox Ratio, Generator Efficiency (%), Electricity Price ($/kWh), and Operating Hours Per Year in the units shown.

Step 2

Read Tip Speed (m/s), Rotor Area (m²), RPM, Theoretical Power (Watts), Power Output (Watts), Torque (Nm), Power Output (kW), and Estimated Annual Revenue in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Small Turbine

Blade Length (meters): 20; Wind Speed (m/s): 8; Air Density (kg/m³): 1.225; Turbine Efficiency (%): 30; Gearbox Ratio: 40; Generator Efficiency (%): 90; Electricity Price ($/kWh): 0.15; Operating Hours Per Year: 2,500

Tip Speed (m/s): 80 m/s; Rotor Area (m²): 1,256.636 m²; RPM: 76.39443721 RPM; Theoretical Power (Watts): 394,081.0496 Watts; Power Output (Watts): 106,401.8834 Watts; Torque (Nm): 13,300.23542 Nm; Power Output (kW): 106.4018834 kW; Estimated Annual Revenue: 39,900.70627 USD

Medium Turbine

Blade Length (meters): 40; Wind Speed (m/s): 12; Air Density (kg/m³): 1.225; Turbine Efficiency (%): 35; Gearbox Ratio: 50; Generator Efficiency (%): 92; Electricity Price ($/kWh): 0.15; Operating Hours Per Year: 3,000

Tip Speed (m/s): 120 m/s; Rotor Area (m²): 5,026.544 m²; RPM: 57.29582791 RPM; Theoretical Power (Watts): 5,320,094.17 Watts; Power Output (Watts): 1,713,070.323 Watts; Torque (Nm): 285,511.7204 Nm; Power Output (kW): 1,713.070323 kW; Estimated Annual Revenue: 770,881.6452 USD

Large Turbine

Blade Length (meters): 60; Wind Speed (m/s): 15; Air Density (kg/m³): 1.225; Turbine Efficiency (%): 40; Gearbox Ratio: 60; Generator Efficiency (%): 93; Electricity Price ($/kWh): 0.15; Operating Hours Per Year: 3,500

Tip Speed (m/s): 150 m/s; Rotor Area (m²): 11,309.724 m²; RPM: 47.74652326 RPM; Theoretical Power (Watts): 23,379,320.08 Watts; Power Output (Watts): 8,697,107.07 Watts; Torque (Nm): 1,739,421.414 Nm; Power Output (kW): 8,697.10707 kW; Estimated Annual Revenue: 4,565,981.212 USD

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