Square Degree (deg²)

A square degree (deg² or sq.deg.) equals (π/180)² ≈ 0.000305 steradians. A complete sphere covers 41,253 square degrees. The full Moon is about 0.2 deg². Common in astronomy: survey areas, galaxy cluster sizes, and cosmic microwave background maps.

Convert From Square Degrees

Square Degree to Steradian Square Degree to Millisteradian Square Degree to Microsteradian Square Degree to Nanosteradian Square Degree to Square Arcminute Square Degree to Square Arcsecond Square Degree to Spat Square Degree to Hemisphere Square Degree to Octant Square Degree to Spherical Quadrant Square Degree to Percent of Sphere

Convert To Square Degrees

Steradian to Square Degree msr to Square Degree Microsteradian to Square Degree Nanosteradian to Square Degree Square Arcminute to Square Degree Square Arcsecond to Square Degree Spat to Square Degree Hemisphere to Square Degree Octant to Square Degree Spherical Quadrant to Square Degree Percent of Sphere to Square Degree

Conversion Factors

1 deg² 0.0003046174 sr

1 deg² 0.3046174 msr

1 deg² 304.6174 μsr

1 deg² 304617.4 nsr

1 deg² 3600.0018909 arcmin²

1 deg² 12960015.997 arcsec²

1 deg² 2.4240682482e-5 sp

1 deg² 4.8481364963e-5 hemisphere

1 deg² 0.0001939255 octant

1 deg² 9.6962729911e-5 quadrant

1 deg² 0.0024240684 %sphere

Related Units

Steradian (sr) Millisteradian (msr) Microsteradian (μsr) Nanosteradian (nsr) Square Arcminute (arcmin²) Square Arcsecond (arcsec²) Spat (sp) Hemisphere (hemisphere) Octant (octant) Spherical Quadrant (quadrant) Percent of Sphere (%sphere)