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 |