Omega — ω Greek Letter Symbol
ω
Omega — ω / Ω
24th letter of the Greek alphabet · pronounced /oʊˈmiːɡə/
PhysicsEngineeringMathematicsElectromagnetism
Copy symbol
ω
Lowercase omega
Ω
Uppercase Omega
Technical reference
| Unicode (lowercase) | U+03C9 |
| Unicode (uppercase) | U+03A9 |
| HTML entity | ω |
| HTML decimal | ω |
| LaTeX | \omega |
| Python / Unicode escape | \u03c9 |
| Alt code (Windows) | Alt + 969 |
Uses in science & engineering
Angular velocity
Rate of rotation of an object. Fundamental in rotational mechanics and vibration analysis.
\(v = \omega \cdot r\)
Angular frequency
Rate of oscillation in radians per second. Used in AC circuits, waves, and vibrations.
\(\omega = 2\pi f\)
Ohm (Ω)
Uppercase Omega is the SI unit of electrical resistance.
\(R = \frac{U}{I} \;[\Omega]\)
Natural frequency
Frequency at which a system oscillates in the absence of damping.
\(\omega_n = \sqrt{\frac{k}{m}}\)
Solid angle
Three-dimensional analogue of a plane angle, measured in steradians.
\(\Omega = \frac{A}{r^2} \;[\text{sr}]\)
Related symbols
How to insert in applications
Windows
Best option: copy from this page.
Or press Win + . to open emoji & symbols panel.
Alt codes work only in Word/Notepad with NumLock on and English layout — not in browsers.
Or press Win + . to open emoji & symbols panel.
Alt codes work only in Word/Notepad with NumLock on and English layout — not in browsers.
macOS
Press ⌃⌘Space → Character Viewer → search “omega”
Microsoft Word
Type 03c9 then press Alt+X
Google Docs
Insert → Special characters → search by name
Excel
Insert → Symbol → Subset: Greek → select symbol
LaTeX
Use in math mode: $ … $
Python
Use Unicode escape or chr()
HTML / CSS
Use HTML entity or decimal code