I was just working on a problem and i seem to keep getting it wrong. I think i might be converting wrong. all im wondering is.. is Mm the same as mm(millimeters)?

No. Mm is megameters. It equals a billion millimeters.

oh haha that's y i was totally off thanks!

Yes, Mm and mm both represent millimeters. However, the case does make a difference. "Mm" is an abbreviation for megameters, which is equal to one million meters. On the other hand, "mm" represents millimeters, which is equal to one thousandth of a meter. So, make sure to use lowercase "mm" when referring to millimeters.