U+03A3
Sigma capitalΣ
Sigma capital is a monochrome text character from the Unicode Greek and Coptic block, listed here under Greek Letters. Copy it with one click, or use the hex, octal, decimal and HTML entity codes below to embed it in web pages, code, and documents.
Quick facts
- Unicode
- U+03A3
- Decimal
- 931
- Hex
- 0x03A3
- Octal
- 0o1643
Unicode identity
| Format | Value | Copy |
|---|---|---|
| Code pointOfficial Unicode notation | U+03A3 | |
| Official nameUnicodeData.txt, Unicode 18.0.0 | GREEK CAPITAL LETTER SIGMA | |
| DecimalBase 10 | 931 | |
| HexadecimalBase 16 | 0x03A3 | |
| OctalBase 8 | 0o1643 | |
| BinaryBase 2 | 0000001110100011 | |
| General categoryLetter, uppercase | Lu | |
| Unicode blockU+0370–U+03FF | Greek and Coptic | |
| Plane | Basic Multilingual Plane (BMP, Plane 0) |
HTML & CSS
| Format | Value | Copy |
|---|---|---|
| HTML entity (decimal) | Σ | |
| HTML entity (hex) | Σ | |
| HTML entity (named) | Σ | |
| CSS content escapeUse inside content: "…" | \03A3 | |
| URL encodedPercent-encoded UTF-8 | %CE%A3 |
Programming languages
| Format | Value | Copy |
|---|---|---|
| JavaScript / TypeScript | \u03A3 | |
| JSONUTF-16 surrogate pairs | \u03A3 | |
| Python | \u03A3 | |
| Java / C# / Kotlin | \u03A3 |
Byte encodings
| Format | Value | Copy |
|---|---|---|
| UTF-82 bytes | CE A3 | |
| UTF-16 (BE) | 03A3 | |
| UTF-32 (BE) | 000003A3 |
How to type Sigma capital
Windows
Hold Alt and type +3A3 with the hex numeric keypad option enabled, or type 3A3 then press Alt+X in Word and most Office apps.
macOS
Enable the Unicode Hex Input keyboard, hold Option, and type 03A3. Or open Character Viewer (Control+Command+Space) and search "Sigma capital".
Linux
Press Ctrl+Shift+U, type 3a3, then press Space or Enter in GTK apps. IBus and most terminals support the same sequence.
HTML, CSS & code
Paste the character directly, or use the escapes above: Σ in HTML, \03A3 in CSS, and \u03A3 in JavaScript.
Official Unicode reference
- Character name
- GREEK CAPITAL LETTER SIGMA
- Block
- Greek and Coptic (U+0370–U+03FF)
- General category
- Lu — Letter, uppercase
Data from the Unicode Character Database, version 18.0.0. See the official code chart for the Greek and Coptic block: U0370.pdf (PDF, unicode.org).
Frequently asked questions
How do I copy the Sigma capital symbol?
Click the Copy button at the top of this page, or select Σ and press Ctrl+C (Cmd+C on Mac). It is plain Unicode text, so it pastes into documents, chats, code, and design tools.
What is the Unicode code point for Sigma capital?
Sigma capital is U+03A3 (decimal 931, hexadecimal 0x03A3, octal 0o1643). It lives in the Greek and Coptic block (U+0370–U+03FF) of the Basic Multilingual Plane (BMP, Plane 0).
What is the official Unicode name of Sigma capital?
The Unicode Standard (version 18.0.0) names this character "GREEK CAPITAL LETTER SIGMA". Its General_Category is Lu (Letter, uppercase).
What is the HTML code for Sigma capital?
Use Σ or Σ, or the named entity Σ. In CSS, use content: "\03A3".
How do I type Sigma capital in code?
JavaScript: "\u03A3". Python: "\u03A3". JSON and Java: "\u03A3". The UTF-8 byte sequence is CE A3.
Is Sigma capital an emoji?
No. Sigma capital is a text symbol and renders as a monochrome glyph in the current font. Some platforms may offer an emoji variant when U+FE0F is appended.