Interactive Tool
Wind Power Estimator
Calculate how much power a wind turbine can produce at any wind speed.
Enter rotor diameter, wind speed, air density and power coefficient to see estimated power output using P = 0.5*rho*A*v^3*Cp.
e.g. 100 m for a modern 3 MW turbine
Betz limit = 0.593; real turbines: 0.35–0.45
Estimated output
Estimates use P = ½ρAv³Cₙ. Simplified; not for engineering design.
How to use this tool
- Enter rotor diameter in metres.
- Set average wind speed at hub height.
- Adjust air density if needed (default 1.225 kg/m3 at sea level).
- Set power coefficient (real turbines: 0.35-0.45).
- Press Calculate.
💡 Good to know
All calculations use standard, published formulas and simplified assumptions so beginners can build intuition. For real projects, always consult qualified engineers and site-specific data.
Frequently asked questions
What is the Betz limit?
The Betz limit (~59.3%) is the theoretical maximum fraction of wind energy a rotor can extract. Real turbines achieve 35-45%.
Why does power increase so fast with wind speed?
Power is proportional to wind speed cubed. Doubling the wind speed increases available power eightfold.