UnicodeCharactercom
𝕂
U+1D542 Β· MATHEMATICAL DOUBLE-STRUCK CAPITAL K

Mathematical Double-Struck Capital K

  • CodepointU+1D542
  • NameMATHEMATICAL DOUBLE-STRUCK CAPITAL K
  • Decimal120130
  • 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+1D542 (𝕂) is MATHEMATICAL DOUBLE-STRUCK CAPITAL K, 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+004B K (compatibility decomposition <font>). NFC and NFD leave it alone, but NFKC and NFKD replace it with U+004B K. Search engines, identifier checks and username systems that apply NFKC will treat the two as the same text.

How to type 𝕂

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Encodings & escapes

UTF-8 encoder β†’
UTF-8F0 9D 95 824 bytes
UTF-16D835 DD42surrogate pair
UTF-320001D5424 bytes
HTML named&Kopf;named character reference
HTML decimal&#120130;
HTML hex&#x1D542;
CSS\1D542in content: "…"
JavaScript\u{1D542}ES2015+
JavaScript\uD835\uDD42surrogate pair
JSON\uD835\uDD42
Python\U0001D542
Python\N{MATHEMATICAL DOUBLE-STRUCK CAPITAL K}by name
Java / C#\uD835\uDD42
C / C++\U0001D542universal character name
Rust / Swift / PHP\u{1D542}
Go\U0001D542
Ruby\u{1D542}
Excel / Sheets=UNICHAR(120130)
URL-encoded%F0%9D%95%82percent-encoded UTF-8
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Normalization forms

Normalizer β†’
NFCunchanged
NFDunchanged
NFKCU+004B K
NFKDU+004B K
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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+004BKLatin Capital Letter K U+039AΚGreek Capital Letter Kappa U+041AКCyrillic Capital Letter Ka U+16D5α›•Runic Letter Open-P U+212Aβ„ͺKelvin Sign U+FF2BοΌ«Fullwidth Latin Capital Letter K U+1D40A𝐊Mathematical Bold Capital K U+1D43E𝐾Mathematical Italic Capital K U+1D472𝑲Mathematical Bold Italic Capital K U+1D4A6𝒦Mathematical Script Capital K U+1D4DAπ“šMathematical Bold Script Capital K U+1D50Eπ”ŽMathematical Fraktur Capital K U+1D576𝕢Mathematical Bold Fraktur Capital K U+1D5AAπ–ͺMathematical Sans-Serif Capital K U+1D5DEπ—žMathematical Sans-Serif Bold Capital K U+1D612π˜’Mathematical Sans-Serif Italic Capital K
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Nearby in Mathematical Alphanumeric Symbols

All in block β†’
U+1D53C𝔼Mathematical Double-Struck Capital E U+1D53D𝔽Mathematical Double-Struck Capital F U+1D53E𝔾Mathematical Double-Struck Capital G U+1D540𝕀Mathematical Double-Struck Capital I U+1D541𝕁Mathematical Double-Struck Capital J U+1D543𝕃Mathematical Double-Struck Capital L U+1D544𝕄Mathematical Double-Struck Capital M U+1D546𝕆Mathematical Double-Struck Capital O