Wind Speed Height Adjustment Calculator
Adjust wind speed measurements for different heights using the power law
About this calculator
The Wind Speed Height Adjustment Calculator uses the power law equation to convert wind speed measurements between different heights above ground. This is essential for wind energy assessments, meteorological studies, and engineering applications since wind speed increases with height due to reduced surface friction. The calculator helps professionals accurately estimate wind speeds at turbine hub heights, building elevations, or measurement points when data is only available at standard meteorological heights.
How to use
Enter the known wind speed and its measurement height, then specify the target height where you need the adjusted wind speed. Select the appropriate terrain type or power law exponent for your location. Click calculate to get the adjusted wind speed at your desired height using the standard power law formula.
Frequently asked questions
What is the power law exponent for different terrains?
Open water uses 0.10, flat grassland 0.15, suburban areas 0.25, and urban areas with tall buildings 0.40.
Why does wind speed change with height?
Surface friction from terrain features slows wind near the ground, while wind speeds increase at higher altitudes.
How accurate is the power law method?
The power law provides good estimates for heights up to 200 meters in relatively uniform terrain conditions.