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

This character is a Math Symbol and is commonly used, that is, in no specific script.

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 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 the negation of the other.
  • In experimental sciences, the sign commonly indicates the confidence interval or error 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 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 chess, the sign indicates a clear advantage for the white player; the complementary sign ∓ indicates the same advantage for the black player.

The sign is normally pronounced "plus or minus".


System Representation
UTF-8 C2 B1
UTF-16 00 B1
UTF-32 00 00 00 B1
URL-Quoted %C2%B1
HTML-Escape ±
Wrong windows-1252 Mojibake ±
HTML-Escape ±
HTML-Escape ±
HTML-Escape ±
digraph +-
LaTeX \pm
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


Complete Record

Property Value
Age (age) 1.1
Unicode Name (na) PLUS-MINUS SIGN
Unicode 1 Name (na1) PLUS-OR-MINUS SIGN
Block (blk) Latin_1_Sup
General Category (gc) Math Symbol
Script (sc) Common
Bidirectional Category (bc) European Terminator
Combining Class (ccc) Not Reordered
Decomposition Type (dt) None
Decomposition Mapping (dm) ±
Lowercase (Lower)
Simple Lowercase Mapping (slc) ±
Lowercase Mapping (lc) ±
Uppercase (Upper)
Simple Uppercase Mapping (suc) ±
Uppercase Mapping (uc) ±
Simple Titlecase Mapping (stc) ±
Titlecase Mapping (tc) ±
Case Folding (cf) ±
ASCII Hex Digit (AHex)
Alphabetic (Alpha)
Bidi Control (Bidi_C)
Bidi Mirrored (Bidi_M)
Bidi Paired Bracket (bpb) ±
Bidi Paired Bracket Type (bpt) None
Cased (Cased)
Composition Exclusion (CE)
Case Ignorable (CI)
Full Composition Exclusion (Comp_Ex)
Changes When Casefolded (CWCF)
Changes When Casemapped (CWCM)
Changes When NFKC Casefolded (CWKCF)
Changes When Lowercased (CWL)
Changes When Titlecased (CWT)
Changes When Uppercased (CWU)
Dash (Dash)
Deprecated (Dep)
Default Ignorable Code Point (DI)
Diacritic (Dia)
East Asian Width (ea) Ambiguous
Extender (Ext)
FC NFKC Closure (FC_NFKC) ±
Grapheme Cluster Break (GCB) Any
Grapheme Base (Gr_Base)
Grapheme Extend (Gr_Ext)
Hex Digit (Hex)
Hangul Syllable Type (hst) Not Applicable
Hyphen (Hyphen)
ID Continue (IDC)
Ideographic (Ideo)
ID Start (IDS)
IDS Binary Operator (IDSB)
IDS Trinary Operator and (IDST)
Indic Positional Category (InPC) NA
Indic Syllabic Category (InSC) Other
ISO 10646 Comment (isc)
Joining Group (jg) No_Joining_Group
Join Control (Join_C)
Jamo Short Name (JSN)
Joining Type (jt) Non Joining
Line Break (lb) Prefix Numeric
Logical Order Exception (LOE)
Math (Math)
Noncharacter Code Point (NChar)
NFC Quick Check (NFC_QC) Yes
NFD Quick Check (NFD_QC) Yes
NFKC Casefold (NFKC_CF) ±
NFKC Quick Check (NFKC_QC) Yes
NFKD Quick Check (NFKD_QC) Yes
Numeric Type (nt) None
Numeric Value (nv) NaN
Other Alphabetic (OAlpha)
Other Default Ignorable Code Point (ODI)
Other Grapheme Extend (OGr_Ext)
Other ID Continue (OIDC)
Other ID Start (OIDS)
Other Lowercase (OLower)
Other Math (OMath)
Other Uppercase (OUpper)
Pattern Syntax (Pat_Syn)
Pattern White Space (Pat_WS)
Quotation Mark (QMark)
Radical (Radical)
Sentence Break (SB) Other
Simple Case Folding (scf) ±
Script Extension (scx) Common
Soft Dotted (SD)
STerm (STerm)
Terminal Punctuation (Term)
Unified Ideograph (UIdeo)
Variation Selector (VS)
Word Break (WB) Other
White Space (WSpace)
XID Continue (XIDC)
XID Start (XIDS)
Expands On NFC (XO_NFC)
Expands On NFD (XO_NFD)
Expands On NFKC (XO_NFKC)
Expands On NFKD (XO_NFKD)