Enter the distance, length, and angle into the calculator to determine the angular size of a triangle.
Angular Size Formula
The following formula is used to calculate the angular size.
D = 2 * L * tan (a/2)
- Where D is the angular size
- L is the radius/length depicted below
- a is the angle depicted below

Angular Size Definition
An angular size is a value of the length of a field of view.
Angular Size Example
How to calculate angular size?
- First, determine the radius.
Measure the radius.
- Next, determine the angle.
Measure the angle.
- Finally, calculate the size.
Calculate the angular size using the equation above.
FAQ
What is an angular size?
An angular size is a value of length that represents the total length of a field of view from a point of a triangle, a certain radius, and certain angle. This can be seen as D in the above depiction.

Related Terms
angular size calculator |
angular size formula |
how to calculate angular size |
angular size |
angular diameter |
angular diameter distance |
angular size of the moon |
apparent size |
angular diameter of the moon |
angular size of the sun |
angular diameter of the sun |
angular diameter formula |
angular diameter calculator |
apparent diameter |
angular size astronomy |
angular size equation |
moon apparent size |
angular diameter distance formula |
apparent size calculator |
how to calculate angular diameter |
jupiter angular size |
how to find angular size |
angular diameter of jupiter |
angular size formula astronomy |
angular diameter equation |
angular diameter distance calculator |
angular size and distance |
apparent diameter of the sun |
the angular size of the smallest features that a telescope can see is called the angular |
angular width of the moon |
angular size of mars |
the angular diameter of an object |
apparent size of objects at distance |
angular size of venus |
angular list size |
saturn angular size |
angular diameter sun |
moon apparent diameter |