Greek Capital Letter Omega — Click to copy
Ω is the last Greek letter — and the unit for electrical resistance (ohms). Engineers and students type it often. Here’s how.
Quick Reference
| Symbol | Ω |
|---|---|
| Windows | Alt + 234 |
| Mac | Option + Z |
| Unicode | U+03A9 |
| HTML | Ω |
How to Type Ω on Windows
Alt + 234 on the number pad.
How to Type Ω on Mac
Option + Z.
How to Type Ω in Word
Type 03A9 then Alt+X.
How to Type Ω on Mobile
Copy from here, or Greek keyboard.
How to Type Ω in HTML
Use Ω or Ω.
FAQs
Alt code?
The Alt code is 234. Hold Alt, type 234 on the numeric keypad with Num Lock on, then release Alt.
Mac?
Press Option + Z on a Mac. The Ω appears instantly wherever your cursor is.
Unicode?
The Unicode code point is U+03A9, the Greek Capital Letter Omega. In HTML, write it as Ω or #937;.
Ω vs ω?
Ω (U+03A9) is uppercase omega; ω (U+03C9) is lowercase. Uppercase Ω is the ohms unit in electronics, while lowercase ω often means angular velocity in physics.
Ohms?
Yes — Ω is the official symbol for the ohm, the unit of electrical resistance. You will see it on multimeters and in circuit diagrams, like 100Ω.
HTML?
Use the named entity Ω — capital O — in your HTML. The decimal Ω renders identically.
Copy-paste?
Yes, Ω copies cleanly into documents, code, and web pages. It is supported by all standard fonts.
Conclusion
Alt+234 / Option+Z. Code: Ω.