no.  the Rx for contacts specifies a brand of contacts that is known
to fit well on your eyes and to be comfortable-feeling to you.  also,
not all possible prescriptions are available for contacts so there is
some approximation that the doctor must do.

if you were a patient of mine and I measured the eyeglass prescription
you wrote above, the next step to get you a contact prescription would
be to give you a trial pair of lenses in the closest available
powers.  more than likely I would pick a brand of lens that I think
you would prefer based upon our conversation (do you want colors?  do
you commonly have problems with dry eyes? etc) and then try a power
that I think would work, eg -1.00 - 1.25 X 150  (-1.50 cylinder power
IS NOT commonly available for contact lenses).  then you would wear
that lens for several days and see me again for a follow-up visit so I
can see how the lens fits, measure your acuity, and you could tell me
how it feels, etc.  on the follow-up visit you might be ready to get
your final prescription or you might need to try a different lens.  it
just depends.

bottom line-- a glasses Rx does not tell you what your contact lens Rx
would be.  but it is a starting point to find the proper prescription.