bytes2

  _______ ___ ___ _______ _______ _______ _______
 |   _   |   Y   |       |   _   |   _   |       |
 |.  1   |   1   |.|   | |.  1___|   1___|___|   |
 |.  _   \\_   _/`-|.  |-|.  __)_|____   |/  ___/
 |:  1    \|:  |   |:  | |:  1   |:  1   |:  1  \
 |::.. .  /|::.|   |::.| |::.. . |::.. . |::.. . |
 `-------' `---'   `---' `-------`-------`-------'

Convert bytes to another unit of information.

Note Implementation based on this wikipedia article.

Note Some related modules:

• byte-converter
• bytes

Install

npm install bytes2

Examples

Require the module:

var bytes2 = require('bytes2');

Convert 1000 bytes to KB:

var value = bytes2('KB', 1000)
console.log(value) // 1

Convert 1000 bytes to KiB:

var value = bytes2('KiB', 1000)
console.log(value) // 0.9765625

Convert 1000 bytes to KiB, showing only 2 decimal places:

var value = bytes2('KiB', 1000, { decimals: 2 })
console.log(value) // 0.98

Convert 1000 bytes to KiB, prepending the units:

var value = bytes2('KiB', 1000, { prepend: true })
console.log(value) // '0.9765625 KiB'

Convert 1000 bytes to jedecKB, prepending the units:

var value = bytes2('jedecKB', 1000, { prepend: true })
console.log(value) // '0.9765625 KB'

Convert 1000 bytes to KiB, showing only 3 decimal places, prepending the units and using '-' as the seperator:

var value = bytes2('KiB', 1000, {
  decimals: 3,
  prepend: true,
  seperator: '-',
})
console.log(value) // '0.977-KiB'

bytes2(to, bytes[, opts])

Returns bytes in to units of information.

Option	Type	Default	Explanation
to	String	none	See table below
bytes	Number	none	Integer number of bytes to convert
opts	Object	see below	Options object, specify what you need the defaults will be filled in
opts.decimals	Number	all decimal places	The number of decimal places to round the result to
opts.prepend	String	false	Prepend the units and return a string
opts.seperator	String	' '	Specify what seperator to use with the prepend option

Base-10, decimal, SI and metric:

to	Number of bytes
kB	1000
MB	1000000 (1000^2)
GB	1000000000 (1024^3)
TB	1000000000000 (1024^4)
PB	1000000000000000 (1024^5)
EB	1000000000000000000 (1024^6)

Base-2, binary and IEC

to	Number of bytes
KiB	1024
MiB	1048576 (1024^2)
GiB	1073741824 (1024^3)
TiB	1099511627776 (1024^4)
PiB	1125899906842624 (1024^5)
EiB	1152921504606847000 (1024^6)

JEDEC

Note JEDEC options works basically the same as the base-2 ones, except that if you use the prepend option, it will, for example, correctly add 'KB' and not 'KiB'.

to	Number of bytes
jedecKB	1024
jedecMB	1048576 (1024^2)
jedecGB	1073741824 (1024^3)

Testing

Using Mocha:

npm install
npm test

Contributing

Just send a PR, or create an issue if you are not sure.

Areas ripe for contribution:

• performance
• bugs

License

MIT