I always go by the
. KB or KiloBytes = roughly 1000 and MB or MegaBytes = roughly 1,000,000. Therefore 1000 KB = 1 MB and 1000MB = 1 GB. If you want to be exact there are 8 bits to a byte, 1024 bytes to a kilobyte.
I have trusted cPanel's information as to what I have used.
BTW, the top 2 lines are the same.