A gigabyte commonly known by its abbreviation GB, is a unit of computer storage. 1GB equals 1024 Megabytes (MB) or one billion bytes (1,073,741,824). Hard drives storage capacity is measured in Gigabytes (eg. 80GB or 200GB). Computer memory is measured in megabytes and gigabytes (eg. 128MB (megabytes) or 1GB (gigabytes).
Other computer storages such as flash drives, and DVDs are measured in gigabytes. A common DVD holds 4.7GB, while Blu-ray disks can hold up to 25GB.
One common confusion with gigabytes is that most hard drive manufacturers say that 1GB = 1,000,000,000 bytes, however operating systems and computer memory say that 1GB = 1,073,741,824 bytes (1024 x 1024 x 1024). This means a 400GB hard drive will only be recognized by the operating system as a 465GB. With hard drives becoming larger and larger all the time, this gap will increase. It will be interesting to see how this conflict works out.
Hopefully the table below will make clear how much a gigabyte is actually worth.
|Byte||1 Byte||0.001 KB||0.000001 MB|
|Kilobyte||1,000 Byte||1 KB||0.001 MB|
|Megabyte||1,000,000 Byte||1,000 KB||1 MB|
|Gigabyte||1,000,000,000 Byte||1,000,000 KB||1,000 MB|