Wind Turbine Power Table: Power output by Blade radius
Reference table of power output for Wind Turbine Power across a range of blade radius values — exact, engine-computed figures you can read off at a glance.
Wind Turbine Power Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Power output
1,576.3
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Wind Turbine Power Calculator
The Wind Turbine Power Calculator works out your power output in an instant. Enter blade radius, wind speed and power coefficient (cp) and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the blade radius.
- Enter the wind speed.
- Enter the power coefficient (cp).
- Read off your power output — the calculator updates automatically, with no button to press.
Formula
The Wind Turbine Power Calculator uses the formula:
Power output = 0.5 × 1.225 × 3.141592653589793 × Blade radius ^ 2 × Wind speed ^ 3 × Power coefficient (Cp)
Worked example
For example, with blade radius of 2 m, wind speed of 8 m/s and power coefficient (cp) of 0.4, the power output is 1,576.3.
| Blade radius | 2 m |
|---|---|
| Wind speed | 8 m/s |
| Power coefficient (Cp) | 0.4 |
| Power output | 1,576.3 |
|---|
Results are estimates for educational use, not professional advice.
Key terms explained
- Radius
- The distance from the centre of a circle or sphere to its edge.
Frequently asked questions
Power = ½ × air density × swept area × wind speed³ × Cp. A 2 m blade at 8 m/s with Cp 0.4 produces about 1576 watts.
Power rises with the cube of wind speed, so doubling the wind gives eight times the power. Site wind speed matters enormously.
Cp is the fraction of wind energy a turbine captures. The theoretical maximum (Betz limit) is about 0.59; real turbines reach 0.35–0.45.
Yes. Power scales with the square of the radius, so longer blades sweep more area and capture more energy.
Enter the blade radius. Enter the wind speed. Enter the power coefficient (cp). Read off your power output — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Wind Turbine Power: Formula, Steps & Examples
Learn how to calculate Wind Turbine Power — the formula explained step by step, with worked examples and a free calculator to check your answer.