Yep. "Kilo-" means 1000, "Mega-" means million, and "Giga-" means billion, "Tera-" is trillion.
So a Kilobyte (KB) is 1000 Bytes, a Megabyte (MB) is 1,000,000 Bytes = 1000 KB etc.
If you think of it that way you will be fine. Technically its more like 1024MB = 1GB, etc because of the 8 bits per byte thing and binary and 2^10...something along those lines.
I just always think of 1000 though or else I go cross-eyed!