DATA STORAGE UNIT CONVERSION Do you know how many gigabytes can fit on a DVD or how many megabytes are in a petabyte? Utilize this calculator to convert different data sizes or to determine how much data can fit on various long term storage mediums. Unit Conversion Bytes [B]: Kilobytes [KB]: Megabytes [MB]: Gigabytes [GB]: Terabytes [TB]: Petabytes [PB]: Exabytes [EB]: Floppy Disks: CDs (80 minute): DVDs (1 layer, 1 side):