Capacities
- See also: DVD#Capacity
Most DVD±R/RWs are advertised as having a capacity of 4.7 GB. However these DVDs seem to hold less than the stated 4.7GB because many manufacturers quote the capacity of a DVD using decimal prefixes instead of the binary prefixes often used by software. This can be confusing for many users. While a 4.7 GB DVD can store 4.7 billion bytes: 4,700,000,000 bytes ÷ 1000 B/kB = 4,700,000 kB ÷ 1000 kB/MB = 4,700 MB ÷ 1000 MB/GB = 4.7 GB, using binary prefixes the same capacity is roughly 4.38 GiB: 4,700,000,000 bytes ÷ 1024 B/KiB = 4,589,844 KiB ÷ 1024 KiB/MiB = 4,482.27 MiB ÷ 1024 MiB/GiB = 4.38 GiB.
| Format | Decimal Prefix | Binary Prefix |
|---|---|---|
| DVD±R | 4.70GB | 4.38GiB |
| DVD±RW | 4.70GB | 4.38GiB |
| DVD±R DL | 8.55GB | 7.96GiB |
| DVD-RAM | 4.70GB | 4.27GiB |
| DVD-RAM DL | 9.4GB | 8.75GiB |
| MiniDVD | 1.46GB | 1.36GiB |
| MiniDVD DL | 2.66GB | 2.48GiB |
Read more about this topic: DVD Recordable
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—Mary Field Belenky (20th century)