U+2126 · Letterlike Symbols

Ohm Sign Ω

The ohm sign Ω is a separate Unicode character for the unit of electrical resistance. It exists for compatibility with older character sets and looks identical to the Greek capital omega. Unicode normalization converts it into the Greek letter, so the two are treated as the same character in most modern text processing.

UnicodeU+2126

HTMLΩ

ΩU+2126

Character codes

Unicode code point	`U+2126`
Decimal	`8486`
HTML (hex)	`Ω`
HTML (decimal)	`Ω`
CSS	`\2126`
JavaScript	`\u2126`
Python	`\u2126`
UTF-8 bytes	`E2 84 A6`
UTF-16	`2126`
URL-encoded	`%E2%84%A6`

Character details

Official name	OHM SIGN
Unicode block	Letterlike Symbols
General category	Uppercase Letter (Lu)
SymbolHero category	Letterlike Symbols
Decomposition	`U+03A9`
Lowercase	ω Omega (ω)
Emoji	No

How to type Ω

Windows

In Microsoft Word or Outlook: type 2126 then press Alt + X.
Open Character Map (search “Character Map” in Start), tick “Advanced view”, search for “ohm sign”, then Select and Copy.

Mac

Press Control + Command + Space to open the Character Viewer, search “ohm sign”, and double-click the result.
With the Unicode Hex Input keyboard enabled (System Settings → Keyboard → Input Sources), hold Option and type 2126.

iPhone & Android

Tap Copy at the top of this page, then long-press where you want it and choose Paste.

Docs & web

Google Docs: Insert → Special characters, then search “ohm sign” or enter U+2126.
HTML: Ω
Excel / Google Sheets: =UNICHAR(8486)

Examples

R = 220 Ω
10 kΩ potentiometer
Impedance: 8 Ω speakers

Good to know

Don’t mix it up: It is visually identical to the Greek capital omega Ω (U+03A9), which is the character Unicode recommends for ohms.

Tip: Use Ω (U+03A9) for new documents, because search engines and databases may normalize U+2126 into it anyway.

Display: the character itself is always the same code point, but its shape comes from the font on the device showing it. If you see an empty box, the font lacks this glyph—the text is still correct.