Enter the boundary layer air density and the boundary layer vertical outflow into the Calculator. The calculator will evaluate the Pressure Tendency.

## Pressure Tendency Formula

PT = -g*pbl*Wbl

Variables:

• PT is the Pressure Tendency ()
• pbl is the boundary layer air density
• Wbl is the boundary layer vertical outflow

To calculate Pressure Tendency, multiply the boundary layer air density by the boundary layer vertical outflow, then multiply by -9.8m/s^2.

## How to Calculate Pressure Tendency?

The following steps outline how to calculate the Pressure Tendency.

1. First, determine the boundary layer air density.
2. Next, determine the boundary layer vertical outflow.
3. Next, gather the formula from above = PT = -g*pbl*Wbl.
4. Finally, calculate the Pressure Tendency.
5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem :

Use the following variables as an example problem to test your knowledge.

boundary layer air density = 6.54

boundary layer vertical outflow = 1.234