Solid angle unit conversion table
This table contains conversions between almost all solid angle units. Some units of solid angle are common and some are relatively rare. This is a good query tool.
| Name of unit | Symbol | Definition | Relation to SI units |
|---|---|---|---|
| spat | ≡ 4π sr– The solid angle subtended by a sphereat its centre. | ≈ 12.566 37 sr | |
| square degree | deg 2; sq.deg.; (°) 2 | ≡ ( π⁄ 180) 2sr | ≈ 0.304 62×10 −3sr |
| steradian(SI unit) | sr | The solid angle subtended at the center of a sphere of radius
r by a portion of the surface of the sphere having an area
r2.
| = 1 sr |