Convert Square Arcminute to Steradian

Convert square arcminutes to steradians by entering a value below.

1 arcmin² (square arcminutes) = 8.46159e-8 sr (steradians)

How to Convert Square Arcminutes to Steradians

The square arcminute and steradian are both units of solid angle. 1 steradian equals 11818109.835 square arcminutes. This means to convert square arcminutes to steradians, you divide by 11818109.835.

Formula

steradians = square arcminutes ÷ 11818109.835

Step-by-Step Example

Convert 5 arcmin² to steradians:

1
Convert 5 arcmin² to steradians

We need to convert square arcminutes to steradians

2
Apply the formula

Since 1 sr = 11818109.835 arcmin², divide by 11818109.835

5 ÷ 11818109.835 = 4.230795e-7

Answer

5 arcmin² = 4.230795e-7 sr

Square Arcminute to Steradian Conversion Table

Quick reference table for common square arcminute to steradian conversions. Click any value for detailed calculation.

Square Arcminutes (arcmin²) Steradians (sr)
0.1 arcmin² 8.46159e-9 sr
0.5 arcmin² 4.230795e-8 sr
1 arcmin² 8.46159e-8 sr
2 arcmin² 1.692318e-7 sr
5 arcmin² 4.230795e-7 sr
10 arcmin² 8.46159e-7 sr
25 arcmin² 2.1153975e-6 sr
50 arcmin² 4.230795e-6 sr
100 arcmin² 8.46159e-6 sr

About These Units

Square Arcminute (arcmin²)

A square arcminute equals (1/60)² of a square degree or about 8.46×10⁻⁸ steradians. One square degree = 3,600 square arcminutes. Used for small astronomical fields: nebula sizes, galaxy images, and detector pixel scales. Full Moon ≈ 720 arcmin².

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 square arcminutes to steradians?

To convert square arcminutes to steradians, divide the value by 11818109.835. For example, 10 arcmin² = 8.46159e-7 sr.

How many steradians are in 1 square arcminute?

1 square arcminute equals 8.46159e-8 steradians.

What is the formula for square arcminutes to steradians?

The formula is: sr = arcmin² ÷ 11818109.835.