Wind Power Available Swept Area
Use this wind power available swept area tool when you have measured values for air density, diameter m, speed mps. It applies a transparent mathematical relationship to those values to return an answer in kW. Unlike a prediction or recommendation, this is a calculation from your inputs. This is wind power available, not a turbine's delivered electric power. Enter a different scenario to see how this particular quantity changes; check the assumptions before using it in a project.
How to use this calculator
- Use exact measurements and consistent units for air density, diameter m, speed mps.
- Enter each quantity; blank, nonnumeric and out-of-range inputs are not accepted.
- Compare the reported kW quantity against your own data and the limitations below.
Formula for Wind Power Available Swept Area
kW = 0.5*air_density*π*power(diameter_m/2,2)*power(speed_mps,3)/1000. Inputs are expressed in the units shown by the labels.
- This uses a direct energy relationship and does not retrieve remote data, forecasts or individual account information.
- This is wind power available, not a turbine's delivered electric power.
Worked examples
Worked example — Wind Power Available Swept Area
Enter Air density = 1.225, Diameter m = 3.1, Speed mps = 8.
Apply 0.5*air_density*π*power(diameter_m/2,2)*power(speed_mps,3)/1000.
Calculated value: approximately 2.366951 kW.
Understanding the result
The example produces about 2.366951 kW; this is a mathematical output for the example inputs, not an observed result for your project.
This is wind power available, not a turbine's delivered electric power.
Important notes
This is wind power available, not a turbine's delivered electric power.
Use values from the same measurement period or physical system. The result is in kW and is not a guarantee of capacity, safety, ranking or revenue.
Frequently asked questions
What does Wind Power Available Swept Area calculate?
It converts air density, diameter m, speed mps into a quantity measured in kW using the stated formula.
Which assumption matters most?
This is wind power available, not a turbine's delivered electric power.
How can I check this output?
Recalculate the worked example from the input quantities, confirm units and compare with direct measurements where available. This calculator does not fetch live data.
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Related explanations
Learn the method behind the number or compare the terminology before using the calculator.
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This page provides a calculation tool plus explanatory information so you can understand what the result means and when the underlying method may not fit your situation.