Solid Angles in Steradian

With this calculator the solid angle can be calculated as part of a spherical surface. The three-dimensional solid angle is the ratio of the area cut out (calotte) to the square of the radius of a cone cut out of a sphere.

The unit of measurement for the solid angle in the International System of Units is the steradian (unit symbol sr).

Enter the known values, then click on the 'Calculate' button.

Solid angle calculator  What should be calculated? Solid angles in steradian Calotte area Spherical radius  Input Delete Entries Calotte area A Solid angle Ω Sphere radius r Calotte area A Decimal places 0 1 2 3 4 6 8 10  Result Calotte area A Solid angle Ω Sphere radius r

Solid angle formula

\(\displaystyle Ω = \frac{A}{r^2}\)

You can find more information about the solid angle at Wikipedia