GCSE Link: 3.01 (Units of Information)
There is nothing new on this page for A Level. The following tables have been copied over from the page for GCSE.
Table 1 shows the more common prefixes used when describing memory usage.
Table 1
| Unit | Number of bytes |
|---|---|
| Kilobyte (kB) |
103 = 1,000 bytes
|
| Megabyte (MB) |
106 = 1,000,000 bytes
|
| Gigabyte (GB) |
109 = 1,000,000,000 bytes
|
| Terabyte (TB) |
1012 = 1,000,000,000,000 bytes
|
Table 2 shows the less common prefixes used when describing memory usage.
Table 2
| Unit | Number of bytes |
|---|---|
| Kibibyte (KiB) |
210 = 1,024 bytes
|
| Mebibyte (MiB) |
220 = 1,048,576 bytes
|
| Gibibyte (GiB) |
230 = 1,073,741,824 bytes
|
| Tebibyte (TiB) |
240 = 1,099,511,627,776 bytes
|
How many mebibytes are there in two tebibytes?
2 × 220 = 2,097,152 MiB