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Is 1Gbps equal to 1000Mbps or 1024Mbps? How much MB/s is 1Gbps equal to ?
Possibly, you will get 2 answers:
■ 1Gbps=1000Mbps=125MB/s（ Million Bytes per second）
■ 1Gbps=1024Mbps=128MB/s（Million Bytes per second）
Which is the correct answer? Before giving the reference answer, you need to know a few parameters
Megabyte and Mebibyte
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Mebibyte (Mebi-byte, a unit of bytes in digital information, abbreviated as MiB) |
Computers use binary, and 210=1024 is almost the same as 103=1000, so many people confuse the use of MB and MiB.
For example: 1MiB is equal to 1048576 bytes (1024×1024 or 220 bytes), and 1MB is equal to 1000000 bytes (1000×1000 or 106 bytes), a difference of 4.8576%.
The unit MiB (Mebibyte) is designed to replace MB (megabyte) sometimes, there is a distinct difference between the MiB (220) and the MB (106) in the International System of Units (SI), although the values are very similar. See the Mib to MB conversion table below
| decimal (SI) | binary (IEC 60027-2) | |||||
| Name | Abbreviation | Value | Name | Abbreviation | Value | Percentage difference |
| Kilobytes | KB | 10³ | Kibibyte | KiB | 210 | 2.4% |
| Megabyte | MB | 106 | Mibibyte | MiB | 220 | 4.86% |
| Gigabytes | GB | 109 | Gibibyte | GiB | 230 | 7.37% |
| Terabyte | TB | 1012 | Tebibyte | TiB | 240 | 9.95% |
| Petabytes | PB | 1015 | Pebibyte | PiB | 250 | 12.59% |
| Exabytes | EP | 1018 | Exbibyte | EiB | 260 | 15.29% |
| Zettabyte | ZB | 1021 | Zebibyte | ZiB | 270 | 18.06% |
| Yottabyte | YB | 1024 | Yobibyte | YiB | 280 | 20.89% |
In simple terms, we can think of it like this:
■ If there is no "i", all of them default to decimal, that is, 1MB=103KB=1000KB
■ In most cases (such as describing network speed), it is decimal
■ In a few cases, such as “i” will appear in the internal storage of the computer, the binary system is used at this time, that is, 1MiB=210KiB=1024KiB
MiB has been accepted and used by all major standards organizations, but is rarely used in the computer industry. MB is often used as Mib, although it may be confused with 1000000 bytes.
Windows and Mac operating systems will display different sizes for files of the same storage size, because Windows uses MiB (but Windows is abbreviated to MB, which is also the beginning of confusion), and Mac uses MB.
All versions of Windows will display a 220 bytes file as 1.00MB (in fact, it should be 1MiB). Apple systems before Mac OS X 10.6 are also displayed in this way. After 10.6, the file and disk size are all expressed in Megabytes, that is, a 1024-byte file is displayed as 1MB.
Summary
The reason why the conversion between units is different is that the International System of Units (SI) and the International Electrotechnical Commission (IEC) adopted different systems when formulating Megabyte and Mebibyte. Although the two are very similar in value, But there is a strict difference between the two.
■ if it is used to indicate the storage capacity of storage media, such as hard disks. Binary should be used, the unit is Mebibyte ( MiB), 1Gbps=1024Mbps=128MB/s
■ If it is used to describe network speed, Decimal should be used, the unit is Megabyte（MB）, 1Gbps=1000Mbps=125MB/s
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