Solid Angle Converter
Unit definitions
Steradian
The steradian is the SI unit of solid angle. If you take a sphere and mark an area on its surface that has a surface area of $r^2$, where $r$ is the radius of the sphere, then the solid angle formed at the center is $1\ \text{sr}$.
Full sphere
The full sphere represents the solid angle formed at the center of a sphere when the entire surface area of the sphere is considered. It is equal to $4\pi\ \text{sr}$.
Spat
One full sphere equals one spat. Therefore, a spat equals $4\pi\ \text{sr}$.
Convert Steradian to other Solid Angle units
| Steradian [sr] | Other unit |
|---|---|
| 1 | 0.079577 Full sphere [4π sr] |
| 1 | 0.079577 Spat [sp] |