About the Swept Area Calculator
Rotor swept area for a wind turbine, and the diameter needed for a target area.
Also known as: rotor area calculator, turbine swept area, blade length area.
How to use this calculator
- Enter i know the.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
A = πr² = π(d/2)²
Worked example
Using the values pre-filled in the calculator above:
- I know the: Rotor diameter
- Rotor diameter = 10 m
the calculator returns:
- Swept area: 78.54 m²
- Rotor diameter: 10 m
- Blade length: 5 m
- Circumference of the sweep: 31.416 m