arcseconds (arcsec)

arcseconds as a conversion hub: 5 direct pairs, all with the exact factor on the page.

Definition1 arcsec = 0.0002777778 ° exactly

CategoryAngle Converter

Pairs from here5

Angle Converter

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arcseconds converted to every other unit

arcsec	°	rad	grad	turn	arcmin
1 arcsec	0.0002777778	0.0000048481	0.000308642	0.0000007716	0.01666667
2 arcsec	0.0005555556	0.0000096963	0.000617284	0.0000015432	0.03333333
5 arcsec	0.0013888889	0.0000242407	0.0015432099	0.000003858	0.08333333
10 arcsec	0.0027777778	0.0000484814	0.0030864198	0.000007716	0.16666667
20 arcsec	0.0055555556	0.0000969627	0.0061728395	0.0000154321	0.33333333
50 arcsec	0.01388889	0.0002424068	0.0154321	0.0000385802	0.83333333
100 arcsec	0.02777778	0.0004848137	0.0308642	0.0000771605	1.666667

All conversions starting from arcsec

arcsec to °arcsec to rad arcsec to grad arcsec to turn arcsec to arcmin

Questions

How do I convert from arcseconds?

Pick the target unit from the table on this page, or open the dedicated pair page — each one carries a converter, a table of common values and the exact factor.

Is arcsecond exact or approximate?

The factor shown (1 arcsec = 0.0002777778 °) is fixed by definition, so conversions are exact rather than measured.

What is arcsecond used for?

arcseconds as used in practical measurements