Greek Capital Letter Omega (Ω)

GREEK CAPITAL LETTER OMEGA · U+03A9

Windows Alt + 234 on the numeric keypad

Mac Option+z

Chromebook Ctrl + Shift + U, then 03A9 and Enter

How to type Greek Capital Letter Omega

Windows: hold Alt, type 234 on the numeric keypad, release. This is a legacy OEM/CP437 code (no leading zero) rather than a Windows-1252 one.
Mac: Option+z.
HTML: Ω or Ω.
Chromebook: Ctrl+Shift+U, type 03A9, then Enter.

Reference

Unicode name: GREEK CAPITAL LETTER OMEGA
Code point: U+03A9
Category: Math & measurement
Also searched as: omega ohm ohms resistance

Symbol data last reviewed: July 9, 2026.