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U+2140 · Letterlike Symbols

Double-Struck N-Ary Summation ⅀

Double-Struck N-Ary Summation is the Unicode character U+2140 (official name “DOUBLE-STRUCK N-ARY SUMMATION”) from the Letterlike Symbols block. It belongs to SymbolHero’s letterlike symbols collection. Copy it with the button, or use the codes and keyboard methods below to type it yourself.

UnicodeU+2140
HTML⅀
⅀U+2140

Character codes

Unicode code pointU+2140
Decimal8512
HTML (hex)⅀
HTML (decimal)⅀
CSS\2140
JavaScript\u2140
Python\u2140
UTF-8 bytesE2 85 80
UTF-162140
URL-encoded%E2%85%80

Character details

Official nameDOUBLE-STRUCK N-ARY SUMMATION
Unicode blockLetterlike Symbols
General categoryMath Symbol (Sm)
SymbolHero categoryLetterlike Symbols
Decomposition<font> U+2211
EmojiNo

How to type ⅀

Windows

  • In Microsoft Word or Outlook: type 2140 then press Alt + X.
  • Open Character Map (search “Character Map” in Start), tick “Advanced view”, search for “double-struck n-ary summation”, then Select and Copy.

Mac

  • Press Control + Command + Space to open the Character Viewer, search “double-struck n-ary summation”, and double-click the result.
  • With the Unicode Hex Input keyboard enabled (System Settings → Keyboard → Input Sources), hold Option and type 2140.

iPhone & Android

  • Tap Copy at the top of this page, then long-press where you want it and choose Paste.

Docs & web

  • Google Docs: Insert → Special characters, then search “double-struck n-ary summation” or enter U+2140.
  • HTML: ⅀
  • Excel / Google Sheets: =UNICHAR(8512)

Similar letterlike symbols

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Double-Struck Small Pi
Double-Struck Small Gamma
Double-Struck Capital Gamma
Double-Struck Capital Pi
Turned Sans-Serif Capital G
Turned Sans-Serif Capital L
Reversed Sans-Serif Capital L
Turned Sans-Serif Capital Y
Double-Struck Italic Capital D
Double-Struck Italic Small D
Double-Struck Italic Small E
Double-Struck Italic Small I
Double-Struck Italic Small J
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See all 81 letterlike symbols →

Questions

What is the Unicode for ⅀?

It is U+2140 (DOUBLE-STRUCK N-ARY SUMMATION), decimal 8512.

Is there a Windows Alt code for it?

No standard Alt code exists for this character. In Word type 2140 then Alt+X, or copy it from this page.

How do I type it on a Mac?

There is no built-in Option shortcut. Use the Character Viewer (Control + Command + Space) and search “double-struck n-ary summation”, or copy it from this page.

What is the HTML code?

Use the numeric reference ⅀ (or ⅀). There is no named entity.