Convert Microsteradian to Spat
Convert microsteradians to spats by entering a value below.
How to Convert Microsteradians to Spats
The microsteradian and spat are both units of solid angle. 1 spat equals 12566370.614 microsteradians. This means to convert microsteradians to spats, you divide by 12566370.614.
Formula
Step-by-Step Example
Convert 5 μsr to spats:
We need to convert microsteradians to spats
Since 1 sp = 12566370.614 μsr, divide by 12566370.614
5 ÷ 12566370.614 = 3.9788735774e-7
5 μsr = 3.9788735774e-7 sp
Microsteradian to Spat Conversion Table
Quick reference table for common microsteradian to spat conversions. Click any value for detailed calculation.
| Microsteradians (μsr) | Spats (sp) |
|---|---|
| 0.1 μsr | 7.9577471548e-9 sp |
| 0.5 μsr | 3.9788735774e-8 sp |
| 1 μsr | 7.9577471548e-8 sp |
| 2 μsr | 1.591549431e-7 sp |
| 5 μsr | 3.9788735774e-7 sp |
| 10 μsr | 7.9577471548e-7 sp |
| 25 μsr | 1.9894367887e-6 sp |
| 50 μsr | 3.9788735774e-6 sp |
| 100 μsr | 7.9577471548e-6 sp |
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.
Spat (sp)
The spat equals 4π steradians (≈12.566 sr)—the solid angle subtended by a complete sphere as seen from its center. One spat = 41,253 square degrees = 1 full sphere. Used in radiation physics and isotropic source calculations. Rarely used; steradians preferred.
Frequently Asked Questions
How do I convert microsteradians to spats?
To convert microsteradians to spats, divide the value by 12566370.614. For example, 10 μsr = 7.9577471548e-7 sp.
How many spats are in 1 microsteradian?
1 microsteradian equals 7.9577471548e-8 spats.
What is the formula for microsteradians to spats?
The formula is: sp = μsr ÷ 12566370.614.