What is the name of 1000 terabytes

Units of data sets

In order to be able to clearly display and compare larger amounts of data, additional units for specifying amounts of data have become established in everyday use. The most important key data are listed here in a table:

Old spelling

Specification of the amount of data in bytes

unitabbreviationConversion to the next smaller unit
byteB.1 byte = 8 bit
kilobytekB1 kB = 1024 bytes
megabyteMB1 MB = 1024 kB
GigabytesGB1 GB = 1024 MB
TerabytesTB1 TB = 1024 GB
PetabytesPB1 PB = 1000 TB
Units for specifying the amount of data in bytes

Specification of the amount of data in bits

unitabbreviationConversion to the next smaller unit
bitb1 bit
Kilobitskb1 kb = 1024 bits
MegabitsMb1 Mb = 1024 kb
GigabitGb1 Gb = 1024 Mb
TerabitTb1 Tb = 1024 Gb
PetabitPb1 Pb = 1024 p
Units for specifying the amount of data in bits


  • These units (Multiples of bytes) are given priority when specifying Storage capacities various media (e.g. USB stick, hard drive, CD-ROM, DVD, flash disk, etc.).
  • When specifying Transfer rates is more likely to be on the unit bit resorted to. (Incidentally, the transfer rate is a composite unit made up of the units of data volume and time):

New notation

Base 2 was used in the old spelling (2nd10= 1024). Since the prefixes (kilo-, mega-, giga-, etc.) do not match the conversion figures from the SI system, there was a revision, whereby both bits and bytes are converted in 1000 and 1024 steps can be.

In summary, the following rules apply:

  • If a prefix from the SI system is used as the prefix (kilo- / k-, mega- / M-, giga- / G-, peta- / P-, etc.), the conversion takes place in steps of thousands
  • If the unit is supplemented with the following prefixes, the conversion on base 2 (conversion number 1024) is explicitly specified. The associated prefixes are thus:
    kibi-, mebi-, gibi-, tebi-, etc.

This change caused (and still causes) confusion, as many of the information is now based on different standards. 1 MB could therefore stand for 1,000,000 bytes (new notation) but also for 1,048,576 bytes (old notation). The difference is explained again in a comparison below:

abbreviationOld interpretationNew interpretation
kB (kilobytes) =1024 bytes1000 bytes
MB (megabytes) =1024 * 1024 bytes1000 * 1000 bytes
GB (gigabytes) =1024 * 1024 * 1024 bytes1000 * 1000 * 1000 bytes
KiB (kibibyte) =-1024 bytes
MiB (mebibyte) =-1024 * 1024 bytes
GiB (gibibyte) =-1024 * 1024 * 1024 bytes
Comparison of the old and new spelling
Comment # 42550 by Bratan13425.04.19 13:23


Comment # 42588 from Capital Bra: D06.05.19 15:18
Capital Bra: D


Comment # 45372 by elisabett 03/04/21 12:53 PM

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