Omega symbol (Ω)
U+03A9 · GREEK CAPITAL LETTER OMEGA · Unicode 1.1 (1993)
How to type Ω
Windows
Alt code (numeric keypad)
Alt+234
Turn on Num Lock, hold the Alt key, type 234 on the numeric keypad and let go of Alt: Ω appears.
Uses the old DOS code page 437, which US-English Windows uses for Alt codes without a leading 0; on Windows set to other languages the result can differ.
Word and Outlook: Alt + X
03A9 Alt+X
Type 03A9 and press Alt+X right after it: Word turns the code into Ω. Press Alt+X again to turn it back into the code.
Emoji and symbols panel (Windows 10 and 11)
Win+.
Press Win + full stop (.) to open the panel, go to the Symbols tab (Ω) and pick Ω.
No numeric keypad on your laptop? See the other ways in our Alt codes guide.
Mac
Keyboard shortcut (U.S. layout)
⌥ Option+Z
Press ⌥ Option+Z to type Ω. This is on the standard U.S. and U.S. English Mac layouts.
Character Viewer
Ctrl+⌘ Cmd+Space
Press Ctrl+⌘+Space (or the Globe key + E), search for “omega symbol” and click Ω to insert it.
iPhone
Make a shortcut (Text Replacement)
Turn a short word into Ω once and type it in any app:
- Copy Ω from this page.
- Open Settings › General › Keyboard › Text Replacement and tap +.
- Paste Ω as the Phrase and type a Shortcut, for example ;omega.
- Now type ;omega anywhere: the keyboard suggests Ω.
Android
Make a shortcut (Gboard personal dictionary)
Teach your keyboard a short word that turns into Ω:
- Copy Ω from this page.
- Open Gboard settings › Dictionary › Personal dictionary, choose your language and tap +.
- Paste Ω as the word and type a shortcut, for example ;omega.
- Type ;omega in any app and tap Ω in the suggestions.
Linux
Unicode input
Ctrl+Shift+U 03a9 Enter
Press Ctrl+Shift+U, type 03a9 and press Enter or Space. Works in GTK apps and with IBus (GNOME, Ubuntu, Fedora).
What Ω means and how it is used
Omega Ω is the last letter of the Greek alphabet, hence 'the alpha and the omega' for the beginning and the end. It is the symbol of the ohm, the unit of resistance, and lowercase ω stands for angular velocity. On a US Mac, Option+Z types the Greek capital omega (U+03A9).
In Unicode, Ω is code point U+03A9 with the official name GREEK CAPITAL LETTER OMEGA. It belongs to the Greek and Coptic block and arrived with Unicode 1.1 in 1993.
You will find it in our greek, 69 symbols in all, together with α β γ Δ θ.
Codes for HTML, CSS and JavaScript
Tap Copy next to the code you need.
| HTML entity | Ω | |
|---|---|---|
| HTML decimal | Ω | |
| HTML hex | Ω | |
| CSS | content: "\03A9"; | |
| JavaScript | \u03A9 | |
| URL | %CE%A9 | |
| UTF-8 bytes | CE A9 | |
| Unicode | U+03A9 |
Will it show on my friend's phone?
Ω has been in Unicode since version 1.1 (1993). Practically every phone, computer and app shows it.
Checking your device…
Don't confuse Ω with
These look alike but are different characters. Search, sorting and screen readers treat them differently, so copy the one you mean.
- ΩOmega symbolU+03A9 · GREEK CAPITAL LETTER OMEGA
- Ohm symbolU+2126 · OHM SIGN · Letterlike Symbols
- ᘯU+162F · Unified Canadian Aboriginal Syllabics
- ᘵU+1635 · Unified Canadian Aboriginal Syllabics
- 𐊶U+102B6 · Carian
- 𝛀U+1D6C0 · Mathematical Alphanumeric Symbols
- 𝛺U+1D6FA · Mathematical Alphanumeric Symbols
Names in other languages
What Ω is called in the 12 languages of this site (Unicode CLDR and our editors). Tap a name to open that language's page.
| Language | Name |
|---|---|
| English | Omega symbol |
| Português | Símbolo ômega |
| Español | Símbolo omega |
| Italiano | Simbolo omega |
| Français | Symbole oméga |
| Deutsch | Omega-Zeichen |
| Türkçe | Omega sembolü |
| Bahasa Indonesia | Simbol omega |
| Polski | Symbol omega |
| Русский | Символ омега |
| 日本語 | オメガ記号 |
| 한국어 | 오메가 기호 |
Related symbols
All Greek →Questions people ask
How do I type Ω on a laptop without a numeric keypad?
On Windows press Win + full stop (.) and pick Ω in the Symbols tab, or in Word type 03A9 and press Alt+X. On a Mac press ⌥ Option+Z.
What is the difference between Ω and Ω?
Ω is the omega symbol (U+03A9). Ω is a different character: ohm symbol (U+2126, Letterlike Symbols block). They can look alike, but computers treat them as different letters, so a search for one will not find the other.
How do I type Ω on an iPhone?
The iPhone keyboard has no key for Ω. Copy it here, then add it in Settings › General › Keyboard › Text Replacement with a shortcut like ;omega.
What is the HTML code for the omega symbol?
Use the entity Ω or the numeric code Ω (hex Ω). In CSS write \03A9, in JavaScript \u03A9.
Will Ω show on every phone?
Ω has been in Unicode since version 1.1 (1993). Practically every phone, computer and app shows it.