O sutime de secunda de arc sau centezima e definita ca o zecime de miime a unui gradian (1 grad/10000). In SI este 2π/4000000 radians sau aproximativ 0.1570796 x 10-6 radiani.
1 centezima de secunda de arcc soa = 1*0.3240419979518 arcsecundearcsec
1 centezima de secunda de arcc soa = 1*2.9999999999999E-6 semne unghiulare30°
1 centezima de secunda de arcc soa = 1*9.0011666105306E-5 grade°deg
1 centezima de secunda de arcc soa = 1*2.5E-7 revolutiirev
1 centezima de secunda de arcc soa = 1*324.000000000 miliarcsecundeµas
