Enter the surface area of the object and the wind speed into the calculator to determine the wind pressure and wind force.

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## Wind Pressure Formula

The following formula is used to calculate the wind pressure and wind force.

F = 1/2*p*V^2*A

- Where F is the wind force (N)
- p is the air density (kg/m^3)
- V is the air velocity (m/s)
- A is the surface area (m^2)

The wind force is also known as the **wind load. **

The formula can further be reduced to the following:

WP = 1/2*p*V^2

- Where WP is the wind pressure (Pa)
- p is the air density
- V is the air velocity

## Wind Pressure Definition

Wind pressure is defined as the dynamic force per unit area that is acting on an object that is being affected by the movement of air.

## Example Problem

How to calculate wind pressure?

**First, determine the density of air.**Dry air is estimated to have 1.2 kg/m^3.

**Next, determine the surface area of the object.**In this example, the object is a simple sphere with a cross-sectional surface area of 50 m^2.

**Next, determine the wind speed.**In this example, the wind velocity is 1.5 m/s.

**Finally, calculate the wind pressure using the formula above:**First, the wind force is calculated as:

F = 1/2*p*V^2*A

F = 1/2*1.2*1.5^2*50

F = 67.5 N.

Then the wind pressure is calculated by dividing the force by area:

WP = F/A

WP = 67.5/ 50

WP = 1.35