UnicodeCharactercom
𝐁
U+1D401 Β· MATHEMATICAL BOLD CAPITAL B

Mathematical Bold Capital B

  • CodepointU+1D401
  • NameMATHEMATICAL BOLD CAPITAL B
  • Decimal119809
  • BlockMathematical Alphanumeric Symbols (U+1D400–U+1D7FF)
  • Plane1 β€” Supplementary Multilingual Plane
  • ScriptCommon
  • CategoryLu β€” Uppercase Letter
  • Unicode version3.1 (2001)
  • Bidi classL β€” Left-to-Right
  • Combining class0
  • East Asian widthN β€” Neutral
  • MirroredNo

About this character

U+1D401 (𝐁) is MATHEMATICAL BOLD CAPITAL B, an uppercase letter in the Mathematical Alphanumeric Symbols block. Its script is Common: it is shared by many writing systems rather than belonging to one. It was added in Unicode 3.1 (2001).

It is a font variant of U+0042 B (compatibility decomposition <font>). NFC and NFD leave it alone, but NFKC and NFKD replace it with U+0042 B. Search engines, identifier checks and username systems that apply NFKC will treat the two as the same text.

How to type 𝐁

Β§

Encodings & escapes

UTF-8 encoder β†’
UTF-8F0 9D 90 814 bytes
UTF-16D835 DC01surrogate pair
UTF-320001D4014 bytes
HTML decimal&#119809;
HTML hex&#x1D401;
CSS\1D401in content: "…"
JavaScript\u{1D401}ES2015+
JavaScript\uD835\uDC01surrogate pair
JSON\uD835\uDC01
Python\U0001D401
Python\N{MATHEMATICAL BOLD CAPITAL B}by name
Java / C#\uD835\uDC01
C / C++\U0001D401universal character name
Rust / Swift / PHP\u{1D401}
Go\U0001D401
Ruby\u{1D401}
Excel / Sheets=UNICHAR(119809)
URL-encoded%F0%9D%90%81percent-encoded UTF-8
Β§

Normalization forms

Normalizer β†’
NFCunchanged
NFDunchanged
NFKCU+0042 B
NFKDU+0042 B
Β§

Looks similar

Characters that Unicode’s security data (UTS #39 confusables) lists as visually confusable with this one. Useful for spotting lookalike spoofing in URLs and usernames.

U+0042BLatin Capital Letter B U+0392Ξ’Greek Capital Letter Beta U+0412Π’Cyrillic Capital Letter Ve U+212CℬScript Capital B U+FF22οΌ’Fullwidth Latin Capital Letter B U+1D435𝐡Mathematical Italic Capital B U+1D469𝑩Mathematical Bold Italic Capital B U+1D4D1𝓑Mathematical Bold Script Capital B U+1D505𝔅Mathematical Fraktur Capital B U+1D539𝔹Mathematical Double-Struck Capital B U+1D56D𝕭Mathematical Bold Fraktur Capital B U+1D5A1𝖑Mathematical Sans-Serif Capital B U+1D5D5𝗕Mathematical Sans-Serif Bold Capital B U+1D609π˜‰Mathematical Sans-Serif Italic Capital B U+1D63D𝘽Mathematical Sans-Serif Bold Italic Capital B U+1D671𝙱Mathematical Monospace Capital B
Β§

Nearby in Mathematical Alphanumeric Symbols

All in block β†’
U+1D400𝐀Mathematical Bold Capital A U+1D402𝐂Mathematical Bold Capital C U+1D403𝐃Mathematical Bold Capital D U+1D404𝐄Mathematical Bold Capital E U+1D405𝐅Mathematical Bold Capital F U+1D406𝐆Mathematical Bold Capital G U+1D407𝐇Mathematical Bold Capital H