How to find magnetizing current of squirrel cage ac induction motor without running measurement.

I am using S120  drive with sensorless vector control.

motor rating :

460 V Y connection , 60 Hz, 20.5A, 12.6 KW , 1770 rpm,  Power factor 0.85 , efficiency : 91%,  

Magnetizing current is rated current x sqrt(1-(PF)(PF))

Hello autogen,

so in my case the magnetizing current should be: 1-sqrt(0.85x0.85) = 5.68A, Is this correct?