Greek Capital Letter Sigma
U+03A3Greek and Coptic
Also known as capital sigmasummation (Greek sigma)
Copy and paste Σ. The Greek Capital Letter Sigma character has Unicode code point U+03A3 and decimal HTML code Σ.
Symbol codes
- Unicode
U+03A3- Alt Code
Alt+228- HTML Code
Σ- CSS Code
\3A3- HTML Entity
Σ- HEX Code
Σ
Technical properties
Unicode 18.0.0
- Code point
- U+03A3
- Decimal
- 931
- Unicode name
- GREEK CAPITAL LETTER SIGMA
- Block
- Greek and Coptic · U+0370–U+03FF
- General category
- Uppercase Letter (Lu)
- Script
- Greek
- Introduced
- Unicode 1.1
- JavaScript
- "\u03A3"
Appears in
About Greek Capital Letter Sigma
Σ is encoded in Unicode as code point U+03A3 (decimal 931). Its official Unicode name is GREEK CAPITAL LETTER SIGMA.
It belongs to the Greek and Coptic block (U+0370–U+03FF), its General Category is Uppercase Letter (Lu), and it was added in Unicode 1.1, released in 1993. Unicode assigns it to the Greek script.
Sources: Unicode Character Database 18.0.0, the HTML Standard’s list of named character references, and Unicode’s code page mappings.
How to type or insert Greek Capital Letter Sigma
- Any device
- Select Copy symbol, then paste with Ctrl+V, or ⌘+V on a Mac.
- Windows Alt code
- With Num Lock on, hold Alt, type 228 on the numeric keypad, then release Alt.
- Microsoft Word
- Type
03A3, then press Alt+X. - macOS Character Viewer
- Press Control+⌘+Space and search for “greek capital letter sigma”.
- Linux (GTK and IBus)
- Press Ctrl+Shift+U, type
03a3, then press Space. - HTML
ΣorΣ. In a UTF-8 page you can also paste the character itself.- CSS
content: "\3A3";in a::beforeor::afterrule.- JavaScript
"\u03A3"
Common questions about Greek Capital Letter Sigma
What is the Greek Capital Letter Sigma symbol?
Σ (Greek Capital Letter Sigma) is an uppercase letter in Unicode’s Greek and Coptic block. Its code point is U+03A3, and it has been part of the standard since Unicode 1.1 (1993). It is also known as capital sigma and summation (Greek sigma).
How do I copy and paste the Greek Capital Letter Sigma symbol?
Select Copy symbol at the top of this page, then paste with Ctrl+V on Windows and Linux or ⌘+V on a Mac. On a phone, tap Copy symbol, then touch and hold where you want it and choose Paste. Σ pastes as ordinary text, so it works in documents, messages, and code.
How do I type the Greek Capital Letter Sigma symbol on Windows?
Turn on Num Lock, hold Alt, type 228 on the numeric keypad, then release Alt. In Microsoft Word, type 03A3 and press Alt+X to turn the code into Σ. In any app, open Character Map from the Start menu, search for “greek capital letter sigma”, then select and copy the character.
How do I type the Greek Capital Letter Sigma symbol on a Mac?
Press Control+⌘+Space to open the Character Viewer, search for “greek capital letter sigma”, and double-click the result to insert it.
How do I type the Greek Capital Letter Sigma symbol on an iPhone or Android phone?
The simplest way is to copy it from this page and paste it where you need it. If you use it often, save it as a text shortcut: on iPhone, go to Settings > General > Keyboard > Text Replacement; with Gboard on Android, go to Gboard settings > Dictionary > Personal dictionary.
Can I use the Greek Capital Letter Sigma symbol in Word, Google Docs, and social media?
Yes. Σ is a standard Unicode character, so you can paste it into Microsoft Word, Google Docs, emails, and posts or bios on Instagram, X, Facebook, and TikTok. In Google Docs you can also choose Insert > Special characters and search for “greek capital letter sigma”. In Word, choose Insert > Symbol > More Symbols, set from to Unicode (hex), and enter 03A3 as the character code.
Is the Greek Capital Letter Sigma symbol an emoji?
No. Σ is a text symbol, not an emoji. It takes the color and size of the surrounding text, and its exact shape depends on the font.
Why does the Greek Capital Letter Sigma symbol show as a box or question mark?
An empty box or a question mark means the font on that device has no glyph for Σ. The character is still there: it appears correctly wherever a font covers Unicode’s Greek and Coptic block, and free font families such as Google Noto cover nearly all of Unicode.
What are the HTML and CSS codes for the Greek Capital Letter Sigma symbol?
In HTML, write Σ (decimal) or Σ (hexadecimal), or the named entity Σ. In CSS, use content: "\3A3"; in a ::before or ::after rule, and in JavaScript "\u03A3". See all HTML codes.