What is the order of magnitude of 1 unifieda.m.u. in SI units? Share with your friends Share 1 Jyoti Pant answered this One a.m.u is approximately is equal to 1.67377×10-27 kgThus, it is of order 10-27. 0 View Full Answer Krishna Priya answered this 1 amu=1.66 x 10 -27 kg thus the order of magnitude is -27 1