Wind Turbine Output Calculator
Estimate a wind turbine\u2019s power and energy output from rotor diameter, wind speed and power coefficient using the wind power equation. Calculates in your browser.
Power output
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Show the math
Wind power scales with the swept area and the cube of wind speed:
P = ½ × ρ × A × v³ × Cp
Cp is capped at the Betz limit of 0.593; real turbines reach 0.35–0.45. Daily and annual figures assume the average wind speed holds steady, so treat them as an upper estimate. All math runs in your browser.
What this does
A wind turbine output calculator estimates a turbine’s power and energy from rotor diameter, wind speed, and power coefficient using the wind power equation.
How to use it
- Enter the rotor diameter.
- Enter the wind speed.
- Set the power coefficient.
- Read the power and energy output.
How it works
Output rises with the cube of wind speed, so small speed gains matter a lot. The Betz limit caps Cp at 0.593; real turbines reach 0.35–0.45.
P = ½ × air density × swept area × speed³ × Cp
Understanding your result
Because power rises with the cube of wind speed, the site wind is by far the most important factor, a small turbine in a calm spot will disappoint no matter its size. The Betz limit caps efficiency at 0.59 and real turbines reach 0.35 to 0.45, so judge a site by its average wind speed, not its rated output in a gale.
Example
Doubling wind speed multiplies available power roughly eightfold.
Sources & methodology
Last updated .
Frequently asked questions
How is wind power calculated?
Power = \u00bd \u00d7 air density \u00d7 swept area \u00d7 wind speed\u00b3 \u00d7 Cp. Output rises with the cube of wind speed, so small speed gains matter a lot.
What is the Betz limit?
The theoretical maximum power coefficient is 0.593 \u2014 no turbine can extract more than 59.3% of the wind\u2019s energy. Real turbines reach 0.35\u20130.45.
Is my data stored?
No. Everything is calculated locally in your browser.
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