module ActiveSupport::NumberHelper

# => 1234567890,50 £
number_to_currency(1234567890.50, unit: '£', separator: ',', delimiter: '', format: '%n %u')
# => £1234567890,50
number_to_currency(1234567890.50, unit: '£', separator: ',', delimiter: '')
# => ($1,234,567,890.50)
number_to_currency(-1234567890.50, negative_format: '(%u%n)')

number_to_currency('123a456') # => $123a456
number_to_currency(1234567890.506, locale: :fr) # => 1 234 567 890,51 €
number_to_currency(1234567890.506, precision: 3) # => $1,234,567,890.506
number_to_currency(1234567890.506) # => $1,234,567,890.51
number_to_currency(1234567890.50) # => $1,234,567,890.50

==== Examples

absolute value of the number.
than :format, except %n is here the
number given by :format). Accepts the same fields
numbers (defaults to prepending an hyphen to the formatted
* :negative_format - Sets the format for negative
currency, and %n for the number.
(defaults to "%u%n"). Fields are %u for the
* :format - Sets the format for non-negative numbers
to ",").
* :delimiter - Sets the thousands delimiter (defaults
(defaults to ".").
* :separator - Sets the separator between the units
(defaults to "$").
* :unit - Sets the denomination of the currency
to 2).
* :precision - Sets the level of precision (defaults
(defaults to current locale).
* :locale - Sets the locale to be used for formatting

==== Options

can customize the format in the +options+ hash.
Formats a +number+ into a currency string (e.g., $13.65). You

def number_to_currency(number, options = {})
  NumberToCurrencyConverter.convert(number, options)
end

# => 98 765 432,98
number_to_delimited(98765432.98, delimiter: ' ', separator: ',')
number_to_delimited('112a') # => 112a
number_to_delimited(12345678.05, locale: :fr) # => 12 345 678,05
number_to_delimited(12345678.05, separator: ' ') # => 12,345,678 05
number_to_delimited(12345678, delimiter: ',') # => 12,345,678
number_to_delimited(12345678, delimiter: '.') # => 12.345.678
number_to_delimited(12345678.05) # => 12,345,678.05
number_to_delimited('123456') # => 123,456
number_to_delimited(12345678) # => 12,345,678

==== Examples

fractional and integer digits (defaults to ".").
* :separator - Sets the separator between the
to ",").
* :delimiter - Sets the thousands delimiter (defaults
(defaults to current locale).
* :locale - Sets the locale to be used for formatting

==== Options

hash.
(e.g., 12,324). You can customize the format in the +options+
Formats a +number+ with grouped thousands using +delimiter+

def number_to_delimited(number, options = {})
  NumberToDelimitedConverter.convert(number, options)
end

number_to_human(0.34, units: :distance) # => "34 centimeters"
number_to_human(1, units: :distance) # => "1 meter"
number_to_human(343, units: :distance, precision: 1) # => "300 meters"
number_to_human(54393498000, units: :distance) # => "54.4 gazillion-distance"
number_to_human(54393498, units: :distance) # => "54400 kilometers"
number_to_human(543934, units: :distance) # => "544 kilometers"

Then you could do:

billion: "gazillion-distance"
other: "kilometers"
one: "kilometer"
thousand:
other: "meters"
one: "meter"
unit:
other: "centimeters"
one: "centimeter"
centi:
distance:

If in your I18n locale you have:

number_to_human(500000, units: { unit: 'ml', thousand: 'lt' }) # => "500 lt"
You can also use your own custom unit quantifiers:

==== Custom Unit Quantifiers

number_to_human(12.00001, strip_insignificant_zeros: false) # => "12.0"
number_to_human(12.00001) # => "12"

+false+ to change that):
out by default (set :strip_insignificant_zeros to
Non-significant zeros after the decimal separator are stripped

number_to_human(12345012345, significant: false) # => "12.345 Billion"
number_to_human(500000000, precision: 5) # => "500 Million"

significant: false) # => "1,2 Million"
separator: ',',
number_to_human(1234567, precision: 1,
significant: false) # => "1.2346 Million"
number_to_human(1234567, precision: 4,
number_to_human(489939, precision: 4) # => "489.9 Thousand"
number_to_human(489939, precision: 2) # => "490 Thousand"
number_to_human(1234567890123456789) # => "1230 Quadrillion"
number_to_human(1234567890123456) # => "1.23 Quadrillion"
number_to_human(1234567890123) # => "1.23 Trillion"
number_to_human(1234567890) # => "1.23 Billion"
number_to_human(1234567) # => "1.23 Million"
number_to_human(12345) # => "12.3 Thousand"
number_to_human(1234) # => "1.23 Thousand"
number_to_human(123) # => "123"

==== Examples

* %n - The number
* %u - The quantifier (ex.: 'thousand')
(defaults to "%n %u"). The field types are:
* :format - Sets the format of the output string
:pico, :femto
:mili, :micro, :nano,
* *fractionals*: :deci, :centi,
:quadrillion
:billion, :trillion,
:hundred, :thousand, :million,
* *integers*: :unit, :ten,
might have the following keys:
string containing an i18n scope where to find this hash. It
* :units - A Hash of unit quantifier names. Or a
+true+)
insignificant zeros after the decimal separator (defaults to
* :strip_insignificant_zeros - If +true+ removes
to "").
* :delimiter - Sets the thousands delimiter (defaults
fractional and integer digits (defaults to ".").
* :separator - Sets the separator between the
digits (defaults to +true+)
of significant_digits. If +false+, the # of fractional
* :significant - If +true+, precision will be the #
(defaults to 3).
* :precision - Sets the precision of the number
(defaults to current locale).
* :locale - Sets the locale to be used for formatting

==== Options

(centi, deci, mili, etc).
define a wide range of unit quantifiers, even fractional ones
kilometers", 0.150 becomes "150 milliliters", etc). You may
to use other decimal units (eg.: 1500 becomes "1.5
You can also define your own unit-quantifier names if you want

size.
See number_to_human_size if you want to print a file

(and too hard to read).
Billion"). This is useful for numbers that can get very large
is more readable by humans (eg.: 1200000000 becomes "1.2
Pretty prints (formats and approximates) a number in a way it

def number_to_human(number, options = {})
  NumberToHumanConverter.convert(number, options)
end

number_to_human_size(524288000, precision: 5) # => "500 MB"
number_to_human_size(1234567890123, precision: 5) # => "1.1228 TB"
number_to_human_size(1234567, precision: 2, separator: ',') # => 1,2 MB
number_to_human_size(483989, precision: 2) # => 470 KB
number_to_human_size(1234567, precision: 2) # => 1.2 MB
number_to_human_size(1234567890123) # => 1.12 TB
number_to_human_size(1234567890) # => 1.15 GB
number_to_human_size(1234567) # => 1.18 MB
number_to_human_size(12345) # => 12.1 KB
number_to_human_size(1234) # => 1.21 KB
number_to_human_size(123) # => 123 Bytes

==== Examples

prefix (defaults to :binary)
* :prefix - If +:si+ formats the number using the SI
+true+)
insignificant zeros after the decimal separator (defaults to
* :strip_insignificant_zeros - If +true+ removes
to "").
* :delimiter - Sets the thousands delimiter (defaults
fractional and integer digits (defaults to ".").
* :separator - Sets the separator between the
digits (defaults to +true+)
of significant_digits. If +false+, the # of fractional
* :significant - If +true+, precision will be the #
(defaults to 3).
* :precision - Sets the precision of the number
(defaults to current locale).
* :locale - Sets the locale to be used for formatting

==== Options

generic number.
See number_to_human if you want to pretty-print a

customize the format in the +options+ hash.
method is useful for reporting file sizes to users. You can
representation (e.g., giving it 1500 yields 1.5 KB). This
Formats the bytes in +number+ into a more understandable

def number_to_human_size(number, options = {})
  NumberToHumanSizeConverter.convert(number, options)
end

number_to_percentage(100, format: '%n %') # => 100 %
number_to_percentage('98a') # => 98a%
number_to_percentage(1000, locale: :fr) # => 1 000,000%
number_to_percentage(302.24398923423, precision: 5) # => 302.24399%
number_to_percentage(1000, delimiter: '.', separator: ',') # => 1.000,000%
number_to_percentage(100, precision: 0) # => 100%
number_to_percentage('98') # => 98.000%
number_to_percentage(100) # => 100.000%

==== Examples

string The number field is %n (defaults to "%n%").
* :format - Specifies the format of the percentage
+false+).
insignificant zeros after the decimal separator (defaults to
* :strip_insignificant_zeros - If +true+ removes
to "").
* :delimiter - Sets the thousands delimiter (defaults
fractional and integer digits (defaults to ".").
* :separator - Sets the separator between the
digits (defaults to +false+).
of significant_digits. If +false+, the # of fractional
* :significant - If +true+, precision will be the #
(defaults to 3).
* :precision - Sets the precision of the number
(defaults to current locale).
* :locale - Sets the locale to be used for formatting

==== Options

customize the format in the +options+ hash.
Formats a +number+ as a percentage string (e.g., 65%). You can

def number_to_percentage(number, options = {})
  NumberToPercentageConverter.convert(number, options)
end

# => +1.123.555.1234 x 1343
number_to_phone(1235551234, country_code: 1, extension: 1343, delimiter: '.')

number_to_phone('123a456') # => 123a456
number_to_phone(1235551234, country_code: 1) # => +1-123-555-1234
number_to_phone(1235551234, area_code: true, extension: 555) # => (123) 555-1234 x 555
number_to_phone(1235551234, delimiter: ' ') # => 123 555 1234
number_to_phone(1235551234, area_code: true) # => (123) 555-1234
number_to_phone(1235551234) # => 123-555-1234
number_to_phone('5551234') # => 555-1234
number_to_phone(5551234) # => 555-1234

==== Examples
number.
* :country_code - Sets the country code for the phone
end of the generated number.
* :extension - Specifies an extension to add to the
(defaults to "-").
* :delimiter - Specifies the delimiter to use
* :area_code - Adds parentheses around the area code.

==== Options

123-9876). You can customize the format in the +options+ hash.
Formats a +number+ into a US phone number (e.g., (555)

def number_to_phone(number, options = {})
  NumberToPhoneConverter.convert(number, options)
end

# => 1.111,23
number_to_rounded(1111.2345, precision: 2, separator: ',', delimiter: '.')
number_to_rounded(389.32314, precision: 4, significant: true) # => 389.3

# => 13
number_to_rounded(13, precision: 5, significant: true, strip_insignificant_zeros: true)

number_to_rounded(111.234, locale: :fr) # => 111,234
number_to_rounded(13, precision: 5, significant: true) # => 13.000
number_to_rounded(111.2345, precision: 1, significant: true) # => 100
number_to_rounded(111.2345, significant: true) # => 111
number_to_rounded(389.32314, precision: 0) # => 389
number_to_rounded(13, precision: 5) # => 13.00000
number_to_rounded(111.2345, precision: 2) # => 111.23
number_to_rounded(111.2345) # => 111.235

==== Examples

+false+).
insignificant zeros after the decimal separator (defaults to
* :strip_insignificant_zeros - If +true+ removes
to "").
* :delimiter - Sets the thousands delimiter (defaults
fractional and integer digits (defaults to ".").
* :separator - Sets the separator between the
digits (defaults to +false+).
of significant_digits. If +false+, the # of fractional
* :significant - If +true+, precision will be the #
(defaults to 3).
* :precision - Sets the precision of the number
(defaults to current locale).
* :locale - Sets the locale to be used for formatting

==== Options

You can customize the format in the +options+ hash.
+:significant+ is +false+, and 5 if +:significant+ is +true+).
:precision (e.g., 112.32 has a precision of 2 if
Formats a +number+ with the specified level of

def number_to_rounded(number, options = {})
  NumberToRoundedConverter.convert(number, options)
end