Number formatting


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You can define a format for Metrics and Dimensions that define how numbers are displayed. Juicebox’s number formatting is an extension of D3 Formats ( Juicebox’s extensions support prefixes and suffixes, separate positive, negative, and zero formatting, ordinal formatting, and better formatting for business numbers.

Format options

Number formats in juicebox have the following parts


Every part of the number format is optional except for the positive_format . If only the positive_format is given, it will be used for all numbers.

prefix and suffix

Prefix can be any text that appears before the number, while suffix will appear after the number. They must be between double quotes. Prefix and suffix support a special command pluralize(singular, plural) which choses between two strings. If the number being formatted is one, the singular value will be displayed, otherwise the plural value will be displayed.

Prefix and suffix examples
Format Number Result
"Total sales: ".0f 1234 Total sales: 1234
,.0f" days until Christmas" 1234 1,234 days until Christmas
,.0f"pluralize( student, students)" 4 4 students
,.0f"pluralize( student, students)" 1 1 student


This format documentation is adapted from

Formats have the following parts


You can optionally provide extra formats for negative, zero, or null values. The positive_format will be used when other formats aren’t provided.


The fill can be any character. The presence of a fill character is signaled by the align character following it, which must be one of the following:

Align character Description
> Forces the field to be right-aligned within the available space. (Default behavior).
< Forces the field to be left-aligned within the available space.
^ Forces the field to be centered within the available space.
= like >, but with any sign and symbol to the left of any padding.


The sign can be:

Sign character Description
- nothing for positive and a minus sign for negative. (Default behavior.)
+ a plus sign for positive and a minus sign for negative.
( nothing for positive and parentheses for negative.
SPACE a space for positive and a minus sign for negative.


The symbol can be

Symbol character Description
$ apply currency symbols per the locale definition.
# for binary, octal, or hexadecimal notation, prefix by 0b, 0o, or 0x, respectively.


The zero (0) option enables zero-padding; this implicitly sets fill to 0 and align to =. The width defines the minimum field width; if not specified, then the width will be determined by the content. The comma (,) option enables the use of a group separator, such as a comma for thousands.

[width] and [precision]

Depending on the type, the precision either indicates the number of digits that follow the decimal point (types f and %), or the number of significant digits (types ​, e, g, r, s and p). If the precision is not specified, it defaults to 6 for all types except ​(none), which defaults to 12. Precision is ignored for integer formats (types b, o, d, x, X and c). See precisionFixed and precisionRound for help picking an appropriate precision.

The available type values are:

Format Description
f fixed point notation.

decimal notation with an SI prefix, rounded to significant digits.


Juicebox changes numbers lower than 1 to be formatted with equivalent f notation.

% multiply by 100, and then decimal notation with a percent sign.
ordinal Display as an ordinal number (like 1st, 2nd, 3rd)
e exponent notation.
g either decimal or exponent notation, rounded to significant digits.
r decimal notation, rounded to significant digits.
p multiply by 100, round to significant digits, and then decimal notation with a percent sign.
b binary notation, rounded to integer.
o octal notation, rounded to integer.
d decimal notation, rounded to integer.
x hexadecimal notation, using lower-case letters, rounded to integer.
X hexadecimal notation, using upper-case letters, rounded to integer.
c converts the integer to the corresponding unicode character before printing.
(none) like g, but trim insignificant trailing zeros.


This format will show a certain number of digits. If the number is in the thousands, it wil be

s, f, $, and % formats

  • .Ns formats display numbers with N digits of precisions. This is a good way to display numbers that differ greatly in size.
  • .Nf displays numbers with a N digits after the decimal place.
  • Starting your format with a comma will put commas between 000s.
Format Number Result
.1s 0.9241 0.9
.1s 0.9123 0.9
.1s 0 0.0
.1s 0.00000000001 0.0
.2s 0.9123 0.91
.2s -0.9123 -0.91
.2s 0 0.00
.2s 0.00000000001 0.00
.1s 0.9123 0.9
.1s 0 0.0
.1s 0.00000000001 0.0
.2s 0 0.00
.1s 0.1234567 0.1
.1s 1.234567 1
.1s 12.34567 10
.1s 123.4567 100
.1s 1234.567 1K
.1s 12345.67 10K
.1s 123456.7 100K
.1s 1234567 1M
.1s 12345678 10M
$.1s 12345678 $10M
.1s 123456789 100M
.1s 1234567891 1B
.1s 12345678912 10B
.3s 0.1234567 0.123
.3s 1.234567 1.23
$.3s 1.234567 $1.23
.3s 12.34567 12.3
.3s 123.4567 123
.3s 1234.567 1.23K
.3s 12345.67 12.3K
$.3s 12345.67 $12.3K
.3s 123456.7 123K
.3s 1234567 1.23M
.3s 12345678 12.3M
.3s 123456789 123M
.3s 1234567891 1.23B
.3s 12345678912 12.3B
.1s 0.9 0.9
.1s -0.9 -0.9
.1s 0 0.0
.1s 100 100
.1s 1100 1K
.1s 10000 10K
,.3s 0.000123 0.000
,.3s 0.001234 0.001
,.2s 0.012345 0.01
,.4s 0.12345 0.1235
,.3s 1.2345 1.23
,.3s 123 123
,.2s 12345.56 12K
,.2s 1234567 1.2M
,.2s 1234567890 1.2B
,.2s 123456789012 120B
,.2s 1234567890123 1.2T
.2f 1203 1203.00
.2f -1203 -1203.00
,.2f -1203



Note the commas between the 000s caused by the starting ‘,’

.2f null 0.00
.2f NaN NaN
.1% .12345 12.3%
.2% .12345 12.34%
.2% 123.45 12345.00%
,.2% 123.45 12,345.00%

Prefixes and suffixes

  • Use double quotes to add prefixes or suffixes to your format.
Format Number Result
.2f 1203 1203.00
"sales: ".2f 1203 sales: 1203.00
.2f" cows" 1203 1203.00 cows
"sales: ".2f" cows" 1203 sales: 1203.00 cows
"moo" 1203



A double quoted prefix with no specifier will just show the prefix.

"moo" -1203 moo
"moo" 0 moo
"moo" null moo
.2f"pluralize( cow, cows)" 0 0.00 cows
.2f"pluralize( cow, cows)" 1 1.00 cow
.2f"pluralize( cow, cows)" 2 2.00 cows
"pluralize(There is ,There are )".2f"pluralize( cow, cows)" 0 There are 0.00 cows
"pluralize(There is ,There are )".2f"pluralize( cow, cows)" 1 There is 1.00 cow
"pluralize(There is ,There are )".2f"pluralize( cow, cows)" 2 There are 2.00 cows

Missing formats

  • If the format is missing the raw number or value will be displayed.
Format Number Result
(nothing) 1203 1203
(nothing) -1203 -1203
(nothing) 0 0
(nothing) null null
(nothing) abcd abcd

Positive, negative, zero and null formats

Format Number Result
.2s;.3s 1234 1.2K
.2s;.3s -1234 -1.23K
.2s;.3s;.4s 0 0.0000
,.0f" days from now";|,.0f|" days ago";"today";"--unknown--" 1234 1,234 days from now
,.0f" days from now";|,.0f|" days ago";"today";"--unknown--" -1234 1,234 days ago
,.0f" days from now";|,.0f|" days ago";"today";"--unknown--" 0 today
,.0f" days from now";|,.0f|" days ago";"today";"--unknown--" null –unknown–

Absolute values

Format Number Result
\|.2s\| 1234 1.2K
\|.2s\| -1234 1.2K
.2s;"negative "\|.3s\| -1234

negative 1.23K


Negative formats can have their own prefixes.

.2s;\|.3s\| 1234 1.2K

Dates and times

Format Number Result
<%Y-%m-%d> dt 2014-01-01
<%Y/%m/%d> dt 2014/01/01
<%Y-%m-%d> dt 2014-01-01
<%Y/%m/%d> dt 2014/01/01
<%Y-%m-%d>;;;"NODATA" null NODATA
<%Y/%m/%d>;;;"NODATA" null NODATA
"prefix"<%Y-%m-%d> dt prefix2014-01-01
"The "<%Y-%m-%d>" Conundrum" dt The 2014-01-01 Conundrum
<%Y-%m-%d>"suffix" dt 2014-01-01suffix

Ordinal values

Format Number Result
ordinal 1 1st
ordinal 2 2nd
ordinal 3 3rd
ordinal 4 4th
ordinal 5 5th
ordinal 6 6th
ordinal 7 7th
ordinal 8 8th
ordinal 9 9th
ordinal 10 10th
ordinal 11 11th
ordinal 12 12th
ordinal 21 21st
ordinal 22 22nd
ordinal 23 23rd
ordinal 24 24th
ordinal 100 100th
ordinal 101 101st