Calculators and formula for calculating the 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.
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\(\displaystyle Ω = \frac{A}{r^2}\)
You can find more information about the solid angle at Wikipedia
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