Greek Letters (α to Ω)

Copy any Greek letter with one click below, from α (alpha) to Ω (omega), in small and capital forms. Further down you will find all 24 letters with their names and what they stand for in math and science, plus the quickest ways to type them.

The Greek alphabet: all 24 letters

Letters	Name	Often used for
Α α	Alpha	Angles, alpha particles, significance level in statistics
Β β	Beta	Beta particles, beta versions of software
Γ γ	Gamma	Gamma rays, the gamma function Γ(n)
Δ δ	Delta	Δ for a change in a value, δ for a tiny change
Ε ε	Epsilon	A very small number in calculus
Ζ ζ	Zeta	The Riemann zeta function ζ(s)
Η η	Eta	Efficiency in engineering
Θ θ	Theta	Angles in geometry and trigonometry
Ι ι	Iota	A tiny amount, as in “not one iota”
Κ κ	Kappa	Curvature, and agreement scores in statistics
Λ λ	Lambda	Wavelength, and lambda functions in code
Μ μ	Mu	The mean in statistics, friction, micro
Ν ν	Nu	Frequency in physics
Ξ ξ	Xi	Random variables in math
Ο ο	Omicron	Rarely used, since it looks like the letter o
Π π	Pi	π ≈ 3.14159 for circles
Ρ ρ	Rho	Density, and correlation in statistics
Σ σ ς	Sigma	Σ for a sum, σ for standard deviation
Τ τ	Tau	Torque and time constants
Υ υ	Upsilon	Rarely used, a few particle names in physics
Φ φ	Phi	The golden ratio φ ≈ 1.618, magnetic flux
Χ χ	Chi	The chi-squared test χ² in statistics
Ψ ψ	Psi	The wave function in physics, a sign for psychology
Ω ω	Omega	Ω for ohms, ω for angular speed

Sigma has two small forms. σ is used at the start or middle of a word, and ς only at the end, as in the Greek word λόγος. In math, always use σ.

Some letters have their own pages with more detail: pi π and the sum sign on our math symbols page.

How to type Greek letters

Windows Alt codes

Twelve Greek letters have short Alt codes. Hold Alt and type the number on the number pad, with no zero in front.

Letter	Alt code
α	Alt + 224
Γ	Alt + 226
π	Alt + 227
Σ	Alt + 228
σ	Alt + 229
τ	Alt + 231
Φ	Alt + 232
Θ	Alt + 233
Ω	Alt + 234
δ	Alt + 235
φ	Alt + 237
ε	Alt + 238

Watch out for two lookalikes. Alt + 225 gives ß, the German sharp s, not β. And Alt + 230 gives µ, the micro sign, which looks like Greek μ but is a different character. There is no Alt code for β. Our Alt Code Finder lists every code.

Add a Greek keyboard

If you type Greek often, add the Greek keyboard. On Windows, go to Settings > Time & language > Language & region, add Greek, and switch with Windows key + Space. On a Mac, go to System Settings > Keyboard > Text Input, click Edit and add Greek. Then most letters sit on the matching English key: a gives α, b gives β, d gives δ, p gives π.

Mac shortcuts

On the standard US keyboard, Option + P gives π and Option + Z gives Ω. Option + J gives ∆ and Option + M gives µ, but those two are the math increment sign and the micro sign, not true Greek letters. They look the same, so they are fine for most notes. Our Mac symbols guide has more shortcuts.

Microsoft Word and Google Docs

In both, start an equation (Alt + = in Word, Insert > Symbols > Equation in Google Docs), type a backslash and the letter name, and press Space: \alpha, \beta, \theta, \lambda. Start the name with a capital letter for the capital form, like \Delta or \Omega. In Word you can also type the code, like 03B1, and press Alt + X. See our Google Docs guide for more.

iPhone and Android

Add the Greek keyboard. On iPhone, go to Settings > General > Keyboard > Keyboards > Add New Keyboard and pick Greek. On Android with Gboard, open Gboard settings > Languages > Add keyboard and pick Greek. Then tap the globe key to switch.

HTML and LaTeX

Every Greek letter has an easy HTML name: α gives α, Ω gives Ω, σ gives σ. LaTeX uses the same names with a backslash, like \alpha and \Omega. LaTeX has no command for capital alpha or beta, because they look just like the letters A and B, so you type A and B.

Greek letters that look like English letters

Capital Α, Β, Ε, Ζ, Η, Ι, Κ, Μ, Ν, Ο, Ρ, Τ, Υ and Χ look the same as English letters, but to a computer they are different characters. Do not swap them into English words, names, email addresses or links. Search engines will not match them, and people may think the link is a scam.

Two signs have twins in Unicode. The micro sign µ and the Greek letter μ look the same, and so do the ohm sign Ω and the Greek letter Ω. The ohm sign is only a copy of Greek Ω kept for old systems, so for ohms you can simply use Ω (U+03A9).

Frequently asked questions

How many letters are in the Greek alphabet?

24, from alpha to omega. Each one has a capital and a small form, and sigma has an extra small form, ς, used at the end of words.

What is the Alt code for alpha?

Alt + 224 gives α. Hold Alt and type 224 on the number pad.

Which Greek letter means change?

Delta. Δ means “change in”, so Δt is a change in time, and δ often means a very small change.

Is μ the same as µ?

They look alike but are two different characters. μ (U+03BC) is the Greek letter mu, and µ (U+00B5) is the micro sign from older keyboards. Both are understood as micro.

Why are Greek letters used in math?

Math ran out of Latin letters long ago, and Greek was the language of early science. Using Greek letters for constants and angles keeps them apart from normal variables like x and y.

Sources: the Unicode Greek and Coptic chart and the Unicode Standard notes on the micro and ohm signs. Written by Muhammad Ilyas, updated October 2026.