Ohm Sign
U+2126Letterlike Symbols
Also known as ohm symbolresistance symbol
Copy and paste Ω. The Ohm Sign character has Unicode code point U+2126 and decimal HTML code Ω.
Symbol codes
- Unicode
U+2126- HTML Code
Ω- CSS Code
\2126- HEX Code
Ω
Technical properties
Unicode 18.0.0
- Code point
- U+2126
- Decimal
- 8486
- Unicode name
- OHM SIGN
- Block
- Letterlike Symbols · U+2100–U+214F
- General category
- Uppercase Letter (Lu)
- Script
- Greek
- Introduced
- Unicode 1.1
- JavaScript
- "\u2126"
Appears in
About Ohm Sign
The ohm sign is a compatibility character historically used for the SI unit of electrical resistance; Unicode normalizes it to Greek capital omega.
Ω is encoded in Unicode as code point U+2126 (decimal 8486). Its official Unicode name is OHM SIGN.
It belongs to the Letterlike Symbols block (U+2100–U+214F), its General Category is Uppercase Letter (Lu), and it was added in Unicode 1.1, released in 1993. Unicode assigns it to the Greek script.
Common uses
- Legacy plain-text notation for electrical resistance
- Reading older technical documents and encoded data
Examples
- Resistance
- 8 Ω
Sources: Unicode Character Database 18.0.0.
How to type or insert Ohm Sign
- Any device
- Select Copy symbol, then paste with Ctrl+V, or ⌘+V on a Mac.
- Microsoft Word
- Type
2126, then press Alt+X. - macOS Character Viewer
- Press Control+⌘+Space and search for “ohm sign”.
- Linux (GTK and IBus)
- Press Ctrl+Shift+U, type
2126, then press Space. - HTML
Ω. In a UTF-8 page you can also paste the character itself.- CSS
content: "\2126";in a::beforeor::afterrule.- JavaScript
"\u2126"
Common questions about Ohm Sign
What is the Ohm Sign?
The ohm sign is a compatibility character historically used for the SI unit of electrical resistance; Unicode normalizes it to Greek capital omega. In Unicode it is U+2126, officially named OHM SIGN. It is also known as ohm symbol and resistance symbol.
Should I use the ohm sign Ω or the Greek letter Ω?
Use the Greek capital letter omega, U+03A9. Unicode keeps the ohm sign U+2126 only for compatibility with older character sets, and normalization converts it to omega, so the Greek letter is the safer choice for new text.
How do I copy and paste the Ohm Sign?
Select Copy symbol at the top of this page, then paste with Ctrl+V on Windows and Linux or ⌘+V on a Mac. On a phone, tap Copy symbol, then touch and hold where you want it and choose Paste. Ω pastes as ordinary text, so it works in documents, messages, and code.
How do I type the Ohm Sign on Windows?
In Microsoft Word, type 2126 and press Alt+X to turn the code into Ω. In any app, open Character Map from the Start menu, search for “ohm sign”, then select and copy the character.
How do I type the Ohm Sign on a Mac?
Press Control+⌘+Space to open the Character Viewer, search for “ohm sign”, and double-click the result to insert it.
How do I type the Ohm Sign on an iPhone or Android phone?
The simplest way is to copy it from this page and paste it where you need it. If you use it often, save it as a text shortcut: on iPhone, go to Settings > General > Keyboard > Text Replacement; with Gboard on Android, go to Gboard settings > Dictionary > Personal dictionary.
Can I use the Ohm Sign in Word, Google Docs, and social media?
Yes. Ω is a standard Unicode character, so you can paste it into Microsoft Word, Google Docs, emails, and posts or bios on Instagram, X, Facebook, and TikTok. In Google Docs you can also choose Insert > Special characters and search for “ohm sign”. In Word, choose Insert > Symbol > More Symbols, set from to Unicode (hex), and enter 2126 as the character code.
Is the Ohm Sign an emoji?
No. Ω is a text symbol, not an emoji. It takes the color and size of the surrounding text, and its exact shape depends on the font.
Why does the Ohm Sign show as a box or question mark?
An empty box or a question mark means the font on that device has no glyph for Ω. The character is still there: it appears correctly wherever a font covers Unicode’s Letterlike Symbols block, and free font families such as Google Noto cover nearly all of Unicode.
What are the HTML and CSS codes for the Ohm Sign?
In HTML, write Ω (decimal) or Ω (hexadecimal). In CSS, use content: "\2126"; in a ::before or ::after rule, and in JavaScript "\u2126". See all HTML codes.