Ohm and Omega Symbol (Ω)
Ohm and Omega Symbol
Greek capital omega is used as the SI symbol for the ohm, the unit of electrical resistance.
Codes for Ω
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How to Type Ω on Windows and Word
For the most reliable Windows method, copy the symbol from this page. In Microsoft Word, type 03A9 and press Alt+X. Word converts the hexadecimal Unicode value into Ω. Press Alt+X again to switch the symbol back to its code.
How to Type Ω on Mac, Chromebook, and Linux
On a Mac, open Character Viewer with Control+Command+Space, search for “Ohm and Omega Symbol”, and insert it. Chromebook users can copy the symbol or use the Unicode input method where supported. On Linux, press Ctrl+Shift+U, type 03a9, and press Enter.
Examples and Correct Usage
Write 220 Ω with a space between the value and unit in formal SI style.
Use the actual Unicode character rather than a visually similar keyboard substitute when the distinction matters in mathematics, science, accessibility, searching, or data processing.