On the face of DVD+RW/+R media, it should have a 4.7 GB capacity. But it looks like less than 4.7 GB on a PC?

Generally DVD calls as:
1 KB = 1000 B, 1 MB = 1000 KB, 1 GB = 1000 MB
Computer calls as:
1 KB = 1024 B, 1 MB = 1024 KB, 1 GB = 1024 MB
Therefore, with a PC,
4.7 GB = 4,7000,000,000 Byte / 1,024 = 4,589,843 KB
4,589,843 KB / 1,024 = 4,482 MB
4,482 MB / 1,024 = 4,376 GB
Which is nearly equal, 4.38 GB (a capacity shown will depend on the software)
Both of them has quite same capacity but each of them has different unit, 1000 or 1024. This will lead each has this different size view.

Published in: Blank Media