Greek Capital Letter Omega

Greek Capital Letter Omega is a Greek-alphabet character used both for writing the modern Greek language and, more commonly online, as mathematical or scientific notation — for constants, variables, angles, and units across physics, engineering, and statistics.

Unicode block: Greek and Coptic (U+0370–U+03FF). This block encodes the modern Greek alphabet alongside Coptic letters. Greek letters have been borrowed into mathematics, physics, and engineering notation for centuries, which is why you'll see them constantly outside actual Greek-language text.

At Unicode code point U+03A9 (decimal 937), Greek Capital Letter Omega is the 49th of 135 characters cataloged in this category on How To Type Any Symbol. In terms of typing methods, it is one of the characters in this block with both a documented Windows Alt code and a Mac keyboard shortcut, making it typeable without copy-paste on either platform. Regardless of platform, clicking the copy button above places the exact character on your clipboard, ready to paste into any application that accepts Unicode text.

💡 Good to know: In science and math writing, this letter often has a specific conventional meaning (like π for pi or Σ for summation) — check your field's notation conventions before reusing it for something else.