Greek capital letter sigma symbol Σ

Windows

Tap Copy above, then press Ctrl+V where you want Σ.

Windows has no built-in shortcut for it. In Microsoft Word, type 03A3 and then press Alt+X.

Mac

Press Control+Command+Space, search for “greek capital letter sigma” and double-click Σ.

That shortcut opens the Character Viewer, which has every Unicode symbol.

iPhone

Tap Copy above, then touch and hold where you want Σ and tap Paste.

To type it from the keyboard, open Settings › General › Keyboard › Text Replacement, tap +, paste Σ as the Phrase and add a Shortcut.

Android

Tap Copy above, then touch and hold where you want Σ and tap Paste.

To type it from the keyboard in Gboard, open Gboard settings › Dictionary › Personal dictionary, tap +, paste Σ and add a shortcut.

Linux

Press Ctrl+Shift+U, type 03a3, then press Space or Enter. This works in most GTK and IBus apps.

Word and Google Docs

Word: type 03A3, then press Alt+X.

Google Docs: open Insert › Special characters and search for “greek capital letter sigma”.