Home U+0080 to U+00FF Latin-1 Supplement
Glyph for U+00B1
Source: Noto Sans

U+00B1 Plus-Minus Sign

U+00B1 was added to Unicode in version 1.1 (1993). It belongs to the block U+0080 to U+00FF Latin-1 Supplement in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as biquintile (astrological aspect: 144°).

The glyph is not a composition. It has a Ambiguous East Asian Width. In bidirectional context it acts as European Terminator and is not mirrored. In text U+00B1 behaves as Prefix Numeric regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “plus-minus” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: plus-minus.

The Wikipedia has the following information about this codepoint:

The plus–minus sign, ±, is a mathematical symbol with multiple meanings.

  • In mathematics, it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction.
  • In experimental sciences, the sign commonly indicates the confidence interval or uncertainty bounding a range of possible errors in a measurement, often the standard deviation or standard error. The sign may also represent an inclusive range of values that a reading might have.
  • In medicine, it means "with or without".
  • In engineering, the sign indicates the tolerance, which is the range of values that are considered to be acceptable, safe, or which comply with some standard or with a contract.
  • In botany, it is used in morphological descriptions to notate "more or less".
  • In chemistry, the sign is used to indicate a racemic mixture.
  • In chess, the sign indicates a clear advantage for the white player; the complementary minus-or-plus sign, ∓, indicates the same advantage for the black player.
  • In electronics, this sign may indicate a dual voltage power supply, such as ±5 volts means +5 volts and -5V volts, when used with audio circuits and operational amplifiers.


System Representation
UTF-8 C2 B1
UTF-16 00 B1
UTF-32 00 00 00 B1
URL-Quoted %C2%B1
HTML hex reference ±
Wrong windows-1252 Mojibake ±
HTML named entity ±
HTML named entity &plusmn
HTML named entity ±
HTML named entity ±
alias biquintile (astrological aspect: 144°)
Encoding: EUC-KR (hex bytes) A1 BE
Encoding: ISO-8859-13 (hex bytes) B1
Encoding: ISO-8859-15 (hex bytes) B1
Encoding: ISO-8859-16 (hex bytes) B1
Encoding: ISO-8859-7 (hex bytes) B1
Encoding: ISO-8859-8 (hex bytes) B1
Encoding: JIS0208 (hex bytes) A1 DE
Encoding: MACINTOSH (hex bytes) B1
Encoding: WINDOWS-1250 (hex bytes) B1
Encoding: WINDOWS-1251 (hex bytes) B1
Encoding: WINDOWS-1252 (hex bytes) B1
Encoding: WINDOWS-1253 (hex bytes) B1
Encoding: WINDOWS-1254 (hex bytes) B1
Encoding: WINDOWS-1255 (hex bytes) B1
Encoding: WINDOWS-1256 (hex bytes) B1
Encoding: WINDOWS-1257 (hex bytes) B1
Encoding: WINDOWS-1258 (hex bytes) B1
Encoding: X-MAC-CYRILLIC (hex bytes) B1
AGL: Latin-1 plusminus
AGL: Latin-2 plusminus
AGL: Latin-3 plusminus
AGL: Latin-4 plusminus
AGL: Latin-5 plusminus
Adobe Glyph List plusminus
digraph +-


Complete Record

Property Value
Age 1.1 (1993)
Block Latin-1 Supplement
General Category Math Symbol
Script Common
Bidirectional Category European Terminator
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+00B1 Plus-Minus Sign
Simple Lowercase Mapping Glyph for U+00B1 Plus-Minus Sign
Lowercase Mapping Glyph for U+00B1 Plus-Minus Sign
Simple Uppercase Mapping Glyph for U+00B1 Plus-Minus Sign
Uppercase Mapping Glyph for U+00B1 Plus-Minus Sign
Simple Titlecase Mapping Glyph for U+00B1 Plus-Minus Sign
Titlecase Mapping Glyph for U+00B1 Plus-Minus Sign
Case Folding Glyph for U+00B1 Plus-Minus Sign
ASCII Hex Digit
Bidi Control
Bidi Mirrored
Composition Exclusion
Case Ignorable
Changes When Casefolded
Changes When Casemapped
Changes When NFKC Casefolded
Changes When Lowercased
Changes When Titlecased
Changes When Uppercased
Full Composition Exclusion
Default Ignorable Code Point
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji Presentation
Extended Pictographic
FC NFKC Closure Glyph for U+00B1 Plus-Minus Sign
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
ID Continue
ID Start
IDS Binary Operator
IDS Trinary Operator and
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name
Join Control
Logical Order Exception
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+00B1 Plus-Minus Sign
NFKC Quick Check Yes
NFKD Quick Check Yes
Other Alphabetic
Other Default Ignorable Code Point
Other Grapheme Extend
Other ID Continue
Other ID Start
Other Lowercase
Other Math
Other Uppercase
Prepended Concatenation Mark
Pattern Syntax
Pattern White Space
Quotation Mark
Regional Indicator
Sentence Break Other
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Variation Selector
Word Break Other
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD
Bidi Paired Bracket Glyph for U+00B1 Plus-Minus Sign
Bidi Paired Bracket Type None
East Asian Width Ambiguous
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Prefix Numeric
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+00B1 Plus-Minus Sign
Script Extension
Vertical Orientation U