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Nominal Power Wind Turbine Calculator
Calculates the power of a wind turbine from nominal power and wind speed. The nominal power always refers to a nominal wind speed, this also should be given. The nominal wind speed is sometimes different for onshore turbines, these are those on land, and for offshore turbines, these are those at sea. With this calculator, also the power at a certain speed can be calculated from a different wind speed, or the wind speed needed for a certain power. Not taken into account is the shutdown speed, where the turbine stops to avoid damage. The wind speed is always that at hub height.
Please enter three values, the fourth will be calculated. The formula for nominal power and wind speed is P1 / v1³ = P2 / v2³
Examples: a wind turbine with a nominal power of 5 MW at 11 m/s, has at a wind speed of 4 m/s a power of 962 kW. An offshore wind turbine with a nominal of 10 MW at 15 m/s, on the other hand, only achieves an output of 370 kW at 4 m/s.
In general, the nominal power of technical devices refers to the maximum power that they can absorb or deliver. For wind turbines, the nominal power refers to the power that can be achieved under ideal conditions. At higher wind speeds above the nominal wind speed and below the shutdown speed, more electricity is not generated for safety reasons, although this would be possible by the above formula. Wind turbines for strong wind areas are designed for a higher nominal wind speed. This is of course technically more complex and makes the wind turbine more expensive to purchase, but is accompanied by a higher yield. Which wind turbine is most suitable for which location depends on the conditions there. The calculated values are theoretical; practice is, as always, a little more complicated.
Last updated on 06/24/2025. Author: Jürgen Kummer
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