Enter the visual size and the distance into the Visual Angle Calculator. The calculator will evaluate the Visual Angle.

## Visual Angle Formula

The following two example problems outline the steps and information needed to calculate the Visual Angle.

VA = atan (S/D)

Variables:

- VA is the Visual Angle (degrees)
- S is the visual size
- D is the distance

To calculate a visual angle, take the inverse tangent of the visual size divided by the distance.

## How to Calculate Visual Angle?

The following steps outline how to calculate the Visual Angle.

- First, determine the visual size.
- Next, determine the distance.
- Next, gather the formula from above = VA = atan (S/D).
- Finally, calculate the Visual 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.

visual size = 30

distance = 20

VA = atan (S/D)** **= ?