Steradians: conversions & definition
Steradians (sr) represent solid angle. One unit equals 10^0 sr. A steradian is the solid angle that subtends an area equal to radius squared on a sphere.
Choose the unit you need
Each row converts one sr. Open a converter to enter any value and see its formula, worked example and reference table. Results below are rounded to 10 significant digits.
| Convert to | Equivalent value | Calculator |
|---|---|---|
| Attosteradians (asr) | ≈ 1e+18 | Convert sr to asr |
| Centisteradians (csr) | ≈ 100 | Convert sr to csr |
| Decasteradians (dasr) | ≈ 0.1 | Convert sr to dasr |
| Decisteradians (dsr) | ≈ 10 | Convert sr to dsr |
| Exasteradians (Esr) | ≈ 1e-18 | Convert sr to Esr |
| Femtosteradians (fsr) | ≈ 1e+15 | Convert sr to fsr |
| Gigasteradians (Gsr) | ≈ 1e-9 | Convert sr to Gsr |
| Hectosteradians (hsr) | ≈ 0.01 | Convert sr to hsr |
| Kilosteradians (ksr) | ≈ 0.001 | Convert sr to ksr |
| Megasteradians (Msr) | ≈ 0.000001 | Convert sr to Msr |
| Microsteradians (µsr) | ≈ 1,000,000 | Convert sr to µsr |
| Millisteradians (msr) | ≈ 1,000 | Convert sr to msr |
| Nanosteradians (nsr) | ≈ 1,000,000,000 | Convert sr to nsr |
| Petasteradians (Psr) | ≈ 1e-15 | Convert sr to Psr |
| Picosteradians (psr) | ≈ 1e+12 | Convert sr to psr |
| Quectosteradians (qsr) | ≈ 1e+30 | Convert sr to qsr |
| Quettasteradians (Qsr) | ≈ 1e-30 | Convert sr to Qsr |
| Ronnasteradians (Rsr) | ≈ 1e-27 | Convert sr to Rsr |
| Rontosteradians (rsr) | ≈ 1e+27 | Convert sr to rsr |
| Terasteradians (Tsr) | ≈ 1e-12 | Convert sr to Tsr |
| Yoctosteradians (ysr) | ≈ 1e+24 | Convert sr to ysr |
| Yottasteradians (Ysr) | ≈ 1e-24 | Convert sr to Ysr |
| Zeptosteradians (zsr) | ≈ 1e+21 | Convert sr to zsr |
| Zettasteradians (Zsr) | ≈ 1e-21 | Convert sr to Zsr |
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