Omega Symbol Ω ω Copy Paste — Meaning, Uses, and Keyboard Shortcuts
Omega Symbols — Copy Them Here
Uppercase Omega: Ω
Lowercase omega: ω
Omega is the 24th and final letter of the Greek alphabet. Its name literally means "great O" (ō-mega), contrasting with Omicron ("little O," o-mikron). As the last letter, omega has become a cultural symbol of endings, completion, and the ultimate — the counterpart to Alpha, the beginning.
Omega Symbol Variants
Ω — Uppercase omega (capital)
ω — Lowercase omega
℧ — Inverted omega (mho — unit of electrical conductance)
ꭥ — Latin small letter omega (Latin Extended-E block)
Ꞷ — Latin capital letter omega (phonetic use)
How to Type Ω on Windows
Using the Alt code: hold Alt and type 937 on the numeric keypad for uppercase Ω. For lowercase ω, hold Alt and type 969. Release Alt to insert the symbol.
In Microsoft Word, you can insert Greek letters through Insert > Symbol. Select the Greek and Coptic Unicode subset, find Ω or ω, and click Insert. You can also switch your keyboard to the Greek layout (add it in Windows language settings) and type directly.
Using hex input: in Word, type 03A9 (uppercase) or 03C9 (lowercase) then press Alt+X to convert to Ω or ω respectively.
How to Type Ω on Mac
On macOS, the shortcut for Ω is Option + Z. This inserts the uppercase omega symbol Ω directly in most applications.
For lowercase ω, there is no standard shortcut. Use the Character Viewer (Control + Command + Space), search for "omega", and double-click to insert. If you use omega frequently, you can drag it to the Favorites section in the Character Viewer for quick access.
How to Type Ω on iPhone and Android
iOS and Android standard keyboards don't include direct omega keys. The most practical approach is to copy from this page. For regular use, set up text shortcuts in your keyboard settings: create a shortcut like "OMEG" that expands to Ω. On iOS, this is in Settings > General > Keyboard > Text Replacement.
You can also install a Greek keyboard on both iOS and Android for typing full Greek text, which makes all Greek letters including omega directly accessible.
Omega in Physics and Electrical Engineering
The uppercase Ω is the standard symbol for the ohm — the unit of electrical resistance in the International System of Units (SI). A resistor rated at 10Ω has a resistance of 10 ohms. This usage comes from Georg Simon Ohm, the German physicist who formulated Ohm's Law (V = IR), and the symbol was chosen to honour him.
In physics, lowercase ω (omega) represents angular frequency — the rate of rotation measured in radians per second. For a wave or oscillating system, ω = 2πf, where f is the frequency in hertz. Angular velocity and angular acceleration also use ω in rotational mechanics equations.
In thermodynamics and statistical mechanics, ω represents the number of microstates corresponding to a macrostate — central to Boltzmann's entropy formula S = k ln(ω).
Omega in Mathematics
In set theory and ordinal arithmetic, ω (lowercase omega) represents the first infinite ordinal — the ordinal of the natural numbers. It is the smallest transfinite ordinal and the foundation for Cantor's theory of infinite ordinals. Larger ordinals are expressed as ω+1, ω+2, ..., ω×2, ω², ω^ω, and so on.
In complex analysis, ω (cube root of unity) satisfies ω³ = 1 and ω ≠ 1. The three cube roots of unity are 1, ω, and ω², where ω = (-1 + i√3) / 2.
In number theory, the Hardy-Ramanujan theorem uses ω(n) to denote the number of distinct prime factors of n.
Omega in Astronomy
In astronomy, uppercase Ω (omega) has two major uses. Ω represents the longitude of the ascending node — one of the six Keplerian elements that describe an orbit's orientation in space. Ω₀ represents the density parameter of the universe, the ratio of the actual density of the universe to the critical density. If Ω₀ > 1, the universe is closed and will eventually recollapse. If Ω₀ < 1, it is open and will expand forever. Current measurements suggest Ω₀ ≈ 1, consistent with a flat universe.
Alpha and Omega — Cultural Symbolism
"I am the Alpha and the Omega, the beginning and the end" — this phrase from the Book of Revelation has made omega a powerful symbol in Christian theology representing the divine completeness of Christ as the beginning (Alpha, Α) and ending (Omega, Ω) of all things. The Alpha-Omega symbol appears frequently in Christian art, church architecture, and iconography.
In popular culture, "alpha" and "omega" are used to mean the first and last, the best and the ultimate, or the complete range of something ("from A to Z" equivalent). The term "omega wolf" in pop-culture wolf-pack mythology (though not scientifically accurate) refers to the lowest-ranking member of a pack.
Omega in Social Media and Usernames
Both Ω and ω are popular in gaming usernames, Discord display names, social media bios, and tattoo designs for their aesthetic look and symbolic weight. Ω looks bold and final, while ω has a softer, cursive appearance. They work in most social media text fields — Instagram, Twitter/X, TikTok bios, Discord names, and Roblox usernames (subject to platform character restrictions).
Unicode Details
Uppercase Ω: Unicode U+03A9, "GREEK CAPITAL LETTER OMEGA." UTF-8: CE A9.
Lowercase ω: Unicode U+03C9, "GREEK SMALL LETTER OMEGA." UTF-8: CF 89.
Ohm sign: Unicode U+2126, "OHM SIGN" — technically distinct from Ω but identical in appearance and treated as equivalent by Unicode normalisation.