Angular Size Calculator

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


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.

angular size calculator

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