Convert 9.55milliHenry's to Ohms

First of all, let's get the terms correct. It's "millihenrys", not "milliHenry's", and it's "ohms", not "Ohms".

Presumably, you are trying to find out the inductive reactance (XL) of a circuit having an inductance (L) of 9.55 mH? The equation for this is:

XL = 2 pi f L

As you can see, you need to know the frequency (f)in order to do this.