Megabyte - wikipedia Megabyte This article is about the unit of data. For the ReBoot character, see Megabyte ( ReBoot ). Multiples of bytes Decimal Value Metric 1000 kB kilobyte 1000 MB megabyte 1000 GB gigabyte 1000 TB terabyte 1000 PB petabyte 1000 EB exabyte 1000 ZB zettabyte 1000 YB yottabyte Binary Value IEC JEDEC 1024 KiB kibibyte KB kilobyte 1024 MiB mebibyte MB megabyte 1024 GiB gibibyte GB gigabyte 1024 TiB tebibyte -- 1024 PiB pebibyte -- 1024 EiB exbibyte -- 1024 ZiB zebibyte -- 1024 YiB yobibyte -- Orders of magnitude of data The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB. The unit prefix mega is a multiplier of 1000000 ( 10 ) in the International System of Units ( SI ). Therefore, one megabyte is one million bytes of information. This definition has been incorporated into the International System of Quantities. However, in the computer and information technology fields, several other definitions are used that arose for historical reasons of convenience. A common usage has been to designate one megabyte as 1048576bytes ( 2 B ), a measurement that conveniently expresses the binary multiples inherent in digital computer memory architectures. However, most standards bodies have deprecated this usage in favor of a set of binary prefixes, in which this quantity is designated by the unit mebibyte ( MiB ). Less common is a convention that used the megabyte to mean 1000 × 1024 ( 1024000 ) bytes. Contents 1 Definitions 2 Examples of use 3 See also 4 References 5 External links Definitions The megabyte is commonly used to measure either 1000 bytes or 1024 bytes. The interpretation of using base 1024 originated as a compromise technical jargon for the byte multiples that needed to be expressed by the powers of 2 but lacked a convenient name. As 1024 ( 2 ) approximates 1000 ( 10 ), roughly corresponding to the SI prefix kilo -, it was a convenient term to denote the binary multiple. In 1998 the International Electrotechnical Commission ( IEC ) proposed standards for binary prefixes requiring the use of megabyte to strictly denote 1000 bytes and mebibyte to denote 1024 bytes. By the end of 2009, the IEC Standard had been adopted by the IEEE, EU, ISO and NIST. Nevertheless, the term megabyte continues to be widely used with different meanings : Base 10 1 MB = 1000000 bytes ( = 1000 B = 10 B) is the definition recommended by the International System of Units ( SI ) and the International Electrotechnical Commission IEC. This definition is used in networking contexts and most storage media, particularly hard drives, flash - based storage, and DVDs, and is also consistent with the other uses of the SI prefix in computing, such as CPU clock speeds or measures of performance. The Mac OS X 10.6 file manager is a notable example of this usage in software. Since Snow Leopard, file sizes are reported in decimal units. In this convention, one thousand megabytes ( 1000 MB ) is equal to one gigabyte ( 1 GB ), where 1 GB is one billion bytes. Base 2 Main article : mebibyte 1 MB = 1048576 bytes ( = 1024 B = 2 B) is the definition used by Microsoft Windows in reference to computer memory, such as RAM. This definition is synonymous with the unambiguous binary prefix mebibyte. In this convention, one thousand and twenty - four megabytes ( 1024 MB ) is equal to one gigabyte ( 1 GB ), where 1 GB is 1024 bytes. Mixed 1 MB = 1024000 bytes ( = 1000 × 1024 B) is the definition used to describe the formatted capacity of the 1.44 MB 3.5 - inch HD floppy disk, which actually has a capacity of 1474560bytes. Semiconductor memory doubles in size for each address lane added to an integrated circuit package, which favors counts that are powers of two. The capacity of a disk drive is the product of the sector size, number of sectors per track, number of tracks per side, and the number of disk platters in the drive. Changes in any of these factors would not usually double the size. Sector sizes were set as powers of two ( most common 512 bytes or 4096 bytes ) for convenience in processing. It was a natural extension to give the capacity of a disk drive in multiples of the sector size, giving a mix of decimal and binary multiples when expressing total disk capacity. Examples of use 1.44 MB floppy disks can store 1,474,560 bytes of data. MB in this context means 1,000 × 1,024 bytes. Depending on compression methods and file format, a megabyte of data can roughly be : a 1 megapixel bitmap image with 256 colors ( 8 bits / pixel color depth ) stored without any compression. a 4 megapixel JPEG image with normal compression. approximately 1 minute of 128 kbit / s MP3 compressed music. 6 seconds of uncompressed CD audio. a typical English book volume in plain text format ( 500 pages × 2000 characters per page ). The human genome consists of DNA representing 800 MB of data. The parts that differentiate one person from another can be compressed to 4 MB. See also Timeline of binary prefixes Gigabyte § Consumer confusion References Jump up ^ `` Archived copy ''. Archived from the original on June 7, 2007. Retrieved June 1, 2007. ^ Jump up to : `` Definitions of the SI units : The binary prefixes ''. National Institute of Standards and Technology. Jump up ^ SanDisk USB Flash Drive `` Note : 1 megabyte ( MB ) = 1 million bytes ; 1 gigabyte ( GB ) = 1 billion bytes. '' Jump up ^ `` How Mac OS X reports drive capacity ''. Apple Inc. 2009 - 08 - 27. Retrieved 2009 - 10 - 16. Jump up ^ Christley, S... ; Lu, Y... ; Li, C... ; Xie, X... ( 2008 ). `` Human genomes as email attachments ''. Bioinformatics. 25 ( 2 ) : 274 -- 275. doi : 10.1093 / bioinformatics / btn582. PMID 18996942. External links Historical Notes About The Cost Of Hard Drive Storage Space the megabyte ( established definition in Networking and Storage industries ; from whatis.com ) International Electrotechnical Commission definitions IEC prefixes and symbols for binary multiples Units of information Base unit bit Platform - dependent units nibble byte syllable parcel word Platform - independent units unibit ( 1 ) dibit ( 2 ) tribit ( 3 ) quadbit ( 4 ) quartet ( 4 ) sextet ( 6 ) octet ( 8 ) hextet ( 16 ) declet ( 10 ) doublet ( 16 ) quadlet ( 32 ) octlet ( 64 ) hexlet ( 128 ) triad ( 3 ) tetrad ( 4 ) pentad ( 5 ) hexad ( 6 ) heptad ( 7 ) octad ( 8 ) slab ( 12 ) catena ( 24 ) Traditional bit units kilobit megabit gigabit terabit petabit exabit zettabit yottabit Traditional byte units kilobyte megabyte gigabyte terabyte petabyte exabyte zettabyte yottabyte IEC bit units kibibit mebibit gibibit tebibit pebibit exbibit zebibit yobibit IEC byte units kibibyte mebibyte gibibyte tebibyte pebibyte exbibyte zebibyte yobibyte Retrieved from `` https://en.wikipedia.org/w/index.php?title=Megabyte&oldid=810312927 '' Categories : Units of information Talk Contents About Wikipedia Afrikaans Azərbaycanca বাংলা Беларуская ( тарашкевіца ) ‎ Български Català Dansk Deutsch Español Esperanto Euskara فارسی Français 한국어 Հայերեն Hrvatski Bahasa Indonesia Interlingua Italiano Basa Jawa ქართული Қазақша Latviešu Македонски मराठी Bahasa Melayu Nederlands 日本 語 Norsk Norsk nynorsk پنجابی Polski Português Русский Саха тыла Scots Sicilianu Simple English Slovenčina Српски / srpski Srpskohrvatski / српскохрватски Svenska தமிழ் Татарча / tatarça ไทย Тоҷикӣ Türkçe Українська اردو Tiếng Việt Winaray ייִדיש 粵語 中文 46 more Edit links This page was last edited on 14 November 2017, at 14 : 17. 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Question: 4 mb is equal to how many bytes
Answer: one million bytes