Enter the peripheral speed (m/s) and the upstream speed (m/s) into the Calculator. The calculator will evaluate the Apparent Angle.

## Apparent Angle Formula

AA = atan (Vp/V) * 57.2958

Variables:

- AA is the Apparent Angle (degrees)
- Vp is the peripheral speed (m/s)
- V is the upstream speed (m/s)

To calculate the Apparent Angle, take the arc tangent of the peripheral speed over the upstream speed, then multiply by 57.2958 to convert to degrees.

## How to Calculate Apparent Angle?

The following steps outline how to calculate the Apparent Angle.

- First, determine the peripheral speed (m/s).
- Next, determine the upstream speed (m/s).
- Next, gather the formula from above = AA = atan (Vp/V) * 57.2958.
- Finally, calculate the Apparent Angle.
- 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.

peripheral speed (m/s) = 50

upstream speed (m/s) = 30