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According to many sources, to type the Ω symbol on Windows 10, you use Alt+234 (i.e. hold Alt and type 234 on the keypad). However, for me that produces a Û char (upper case u-circumflex).

I have a UK/GB keyboard.

How do I type an Ω symbol?

To enable alt codes, I added EnableHexNumpad string value to Computer\HKEY_CURRENT_USER\Control Panel\Input Method in the registry.

Edit: In Character Map on Windows 10, the alt code tip is not shown for the omega symbol.

Windows 10 Character Map - Omega

But, the alt code for µ (micro) is shown in Windows 10.

Windows 10 Character Map - Micro

Seems that Û (what I get when I type Alt+234) should actually be Alt+0219. So that's confusing.

Windows 10 Character Map - U-circumflex

Nick Bolton
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4 Answers4

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Depending on the font, keyboard layout and application(?), I've found Ω can be typed by Alt+234, 0937 or 8486... or you might get yet another character, such as ♠. On this PC, at this moment, 234->Ω, 0937->©, 8486->& and 969->╔. sigh

You might find adding another keyboard layout, e.g., United States - international keyboard or Greek (Ελληνικά), helpful. Keyboard layouts can be quickly switched, e.g., with WindowsSpace, and use "dead keys" to type special characters.

Regrettably, omega, Ω, seems resistant to consistency. Mu, µ, is more easily micro-managed.

DrMoishe Pippik
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Press Windows+R and type regedit on the text box. It will ask you for privileges, accept. Then navigate to the key HKEY_CURRENT_USER/Control Panel/Input Method. Create a string value named EnableHexNumpad and set it to 1. Restart your PC.

You need the code point of the character you want to type (for Ω, 3A9). Hold Alt, press + on your Numpad and type your hex code on the numpad, typing letters on your keyboard as needed. Stop holding Alt when done, and voila, you have your Ω!

Giacomo1968
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Joao-3
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The problem is the code page used by your program; Windows, by default utilize ANSI for all programs and advanced programs uses Unicode. ANSI do not have a character for Ω but the 437 (US) codepage for ASCII does and is 234.

On code page 850 (Western European DOS) the code 234 is Û

Seems your program is using ASCII codes, and the extended codepage 850, look if your program can use UNICODE and input the symbol as 0x03A9 also you can use Windows Char Map to copy and paste, but if your app do not support UNICODE the symbol can not be pasted. Also you can look if your software do support extended codepage 437.

More information on:

https://en.wikipedia.org/wiki/Unicode_input

impeeza
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I also had the same issue, alt 234 would produce Û instead of Ω. I have to type 2126 then press alt and X for the omega (Ω) symbol. Hope this helps someone

John Jeffels
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