Okay, I know the voltage (120VAC), and the amperage (0.17 amps). So how much power is it using? (this is my new 24/7 server box)

The simple equation is Watts = Volts * Amps, but with alternating current (A/C), this is not exactly correct. I know that much, but I don't know how to calculate it correctly.

Could one of you please educate me on this?

Thanks