Greek Capital Letter Sigma Alt Code and Symbol

The Alt code for Greek Capital Letter Sigma is 228. Hold Alt, type 228 on the numeric keypad, then release Alt. Greek Capital Letter Sigma also has the Unicode codepoint U+03A3, so you can type it with Alt+931 on Windows, search for U+03A3 in macOS's Character Viewer, use Σ in HTML, or \03A3 in CSS. If your keyboard has no numeric keypad, use the Character Viewer, the HTML entity, or copy the character directly — the Alt key method requires a physical numpad. Copy the Greek Capital Letter Sigma character from this page when you need it in a form, chat message or document that does not accept Alt codes. HTML also defines the named entity Σ for Greek Capital Letter Sigma, but the numeric form Σ is safer when compatibility is uncertain.

Codes for this symbol

Copy any value by clicking it.
Method	Value
Legacy Alt code
Alt + decimal
Alt + X hex
HTML named entity
HTML decimal
HTML hex
CSS escape
Python escape
JavaScript escape
UTF-8 bytes
Unicode codepoint
Unicode block
Unicode category

Not available for this symbol: macOS Option shortcut.

How to type greek capital letter sigma on Windows

Turn Num Lock on so the numeric keypad is active.
Hold the left Alt key.
Type 2 2 8 on the numeric keypad.
Release Alt. The Greek Capital Letter Sigma character (Σ) appears.

If your keyboard has no numeric keypad, see how to type symbols without a numpad.

How to type greek capital letter sigma on macOS

There is no direct Option shortcut for Greek Capital Letter Sigma. Open the Character Viewer with ⌃⌘Space, search for "Greek Capital Letter Sigma" and click the character to insert it.

How to use greek capital letter sigma in code

HTML: or , also
CSS: content:"\03A3"; ()
Python: \u03A3 or chr(0x3A3)
JavaScript: \u03A3 or String.fromCodePoint(0x3A3)
JSON: "\u03A3"
LaTeX: $\Sigma$ (math mode)

Frequently asked questions

What is the Alt code for Greek Capital Letter Sigma?

The legacy Alt code for Greek Capital Letter Sigma is 228. Hold Alt, type 2 2 8 on the numeric keypad, then release Alt.

How do I type Σ without a numpad?

Use the Windows Character Viewer (Win+.), the macOS Character Viewer (⌃⌘Space), an HTML entity such as Σ, or copy the character directly from this page.

Why does Alt+931 not work?

Alt+931 only works on a keyboard with a physical numeric keypad. It also requires the application to accept the numeric-keypad input path. Laptops without a numpad need an alternative method.

What is the Unicode for Greek Capital Letter Sigma?

The Unicode codepoint for Greek Capital Letter Sigma is U+03A3. You can use this value in HTML as Σ, in CSS as \03A3, and in Word with Alt+X.

How do I type Σ on a Mac?

Open the Character Viewer with ⌃⌘Space and search for the character name or U+03A3, then click it.

Back to Greek Letters