Convert Microsteradian to Steradian
Convert microsteradians to steradians by entering a value below.
How to Convert Microsteradians to Steradians
The microsteradian and steradian are both units of solid angle. By definition, 1 steradian equals exactly 1000000 microsteradians. This means to convert microsteradians to steradians, you divide by 1000000.
Formula
Step-by-Step Example
Convert 5 μsr to steradians:
We need to convert microsteradians to steradians
Since 1 sr = 1000000 μsr, divide by 1000000
5 ÷ 1000000 = 5e-6
5 μsr = 5e-6 sr
Microsteradian to Steradian Conversion Table
Quick reference table for common microsteradian to steradian conversions. Click any value for detailed calculation.
| Microsteradians (μsr) | Steradians (sr) |
|---|---|
| 0.1 μsr | 1e-7 sr |
| 0.5 μsr | 5e-7 sr |
| 1 μsr | 1e-6 sr |
| 2 μsr | 2e-6 sr |
| 5 μsr | 5e-6 sr |
| 10 μsr | 1e-5 sr |
| 25 μsr | 2.5e-5 sr |
| 50 μsr | 5e-5 sr |
| 100 μsr | 1e-4 sr |
About These Units
Microsteradian (μsr)
A microsteradian (μsr) equals 10⁻⁶ steradians or about 11.8 square arcminutes. Used in astronomy for field of view specifications, laser beam divergence measurements, and telescope aperture calculations. A typical star appears as ~1 μsr from Earth.
Steradian (sr)
The steradian (sr) is the SI unit of solid angle—the 3D analog of the radian. One steradian is the solid angle subtended by a spherical cap with area r² on a sphere of radius r. A complete sphere subtends 4π ≈ 12.566 steradians. Used in radiometry, photometry, and antenna theory.
Frequently Asked Questions
How do I convert microsteradians to steradians?
To convert microsteradians to steradians, divide the value by 1000000. For example, 10 μsr = 1e-5 sr.
How many steradians are in 1 microsteradian?
1 microsteradian equals 1e-6 steradians.
What is the formula for microsteradians to steradians?
The formula is: sr = μsr ÷ 1000000.