All Greek Letters Copy Paste
α β γ δ — Complete List with Meanings
All 24 Greek letters — uppercase and lowercase — with their names, pronunciations, Unicode codes, and the most common uses in mathematics, science, statistics, and everyday culture. Click any letter to copy it instantly.
Why Greek Letters Are Used in Maths and Science
Greek letters became the standard notation for mathematical and scientific variables in the 16th and 17th centuries, when European mathematicians needed symbols that wouldn’t be confused with Latin letters already in use. The convention stuck — today Greek letters appear in virtually every branch of maths, physics, chemistry, statistics, and engineering.
Beyond academics, Greek letters appear in fraternities and sororities, in tech product names (alpha and beta software versions), in brand identities, and across social media. They’re Unicode characters — copy and paste them anywhere.
All 24 Greek Letters — Complete Copy Paste Reference
Every Greek letter with uppercase and lowercase, name, pronunciation, and primary uses. Click any letter or the Copy button.
| Upper | Lower | Name | Pronounced | Main uses | Unicode | |
|---|---|---|---|---|---|---|
| Α | α | Alpha | AL-fah | Angles, constants, significance level (stats), alpha/beta software versions | U+03B1 | |
| Β | β | Beta | BAY-tah | Regression coefficients, type II error, beta testing, beta particle | U+03B2 | |
| Γ | γ | Gamma | GAM-ah | Gamma function, Euler–Mascheroni constant, gamma rays, photon symbol | U+03B3 | |
| Δ | δ | Delta | DEL-tah | Change or difference (Δx), discriminant of a quadratic, ε–δ proofs | U+0394 | |
| Ε | ε | Epsilon | EP-si-lon | Small positive number in calculus proofs, error term in regression | U+03B5 | |
| Ζ | ζ | Zeta | ZAY-tah | Riemann zeta function ζ(s), damping ratio in engineering | U+03B6 | |
| Η | η | Eta | AY-tah | Efficiency in thermodynamics, viscosity in fluid mechanics | U+03B7 | |
| Θ | θ | Theta | THAY-tah | Angle variables in trig and geometry, Big-Theta notation in CS | U+03B8 | |
| Ι | ι | Iota | eye-OH-tah | Rarely used in maths. “Not one iota” = not the smallest amount | U+03B9 | |
| Κ | κ | Kappa | KAP-ah | Curvature in geometry, thermal conductivity, dielectric constant | U+03BA | |
| Λ | λ | Lambda | LAM-dah | Wavelength, eigenvalues, Poisson rate parameter, lambda functions in code | U+03BB | |
| Μ | μ | Mu | MYOO | Population mean (stats), micro- prefix (μm), friction coefficient | U+03BC | |
| Ν | ν | Nu | NYOO | Frequency in physics/chemistry, kinematic viscosity, neutrino symbol | U+03BD | |
| Ξ | ξ | Xi | ZYE or KSEE | Informal Ethereum symbol (Ξ), random variables in probability | U+039E | |
| Ο | ο | Omicron | OM-i-kron | Rarely used in maths. COVID-19 variant name brought global recognition | U+03BF | |
| Π | π | Pi | PYE | π ≈ 3.14159 — ratio of circle circumference to diameter. Π = product notation | U+03C0 | |
| Ρ | ρ | Rho | ROH | Density in physics, Spearman’s rank correlation ρ, electrical resistivity | U+03C1 | |
| Σ | σ | Sigma | SIG-mah | Σ = summation. σ = standard deviation. Six Sigma. “Sigma male” internet culture | U+03C3 | |
| Τ | τ | Tau | TAW | Torque in physics, time constant in electronics, τ ≈ 6.283 (2π) | U+03C4 | |
| Υ | υ | Upsilon | UP-si-lon | Upsilon meson in particle physics, frequency in spectroscopy | U+03C5 | |
| Φ | φ | Phi | FYE | Golden ratio φ ≈ 1.618, Euler’s totient function Φ(n), magnetic flux | U+03C6 | |
| Χ | χ | Chi | KYE | Chi-squared test (χ²) in statistics, electric susceptibility | U+03C7 | |
| Ψ | ψ | Psi | PSEE | Wave function in quantum mechanics ψ, used in psychology symbol | U+03C8 | |
| Ω | ω | Omega | oh-MAY-gah | Ω = ohm (electrical resistance). ω = angular frequency. “Alpha to omega” = complete | U+03A9 |
Most Used Greek Letters — Ready to Copy
Greek Letters in Internet Culture
Alpha and Beta entered mainstream vocabulary through internet culture — “alpha” for dominant confidence, “beta” for passive traits. Both terms originated in animal behaviour research and are now widely used regardless of scientific accuracy.
Sigma (σ Σ) became a meme personality archetype — the “sigma male” as someone operating outside the social hierarchy entirely. Σ is also summation notation in every maths classroom, and Six Sigma is a major business quality framework.
Omega (Ω) is used as “omega male” in online culture and in gaming communities. It’s the ohm symbol in physics and electronics. The phrase “alpha to omega” means beginning to end — the complete range of something.
Delta (Δ) means “change” in science — Δv = change in velocity. It also names airlines, hotels, and was used as a COVID-19 variant name. In common speech, “delta” signals a gap or difference.
FAQ
How many Greek letters are there? The modern Greek alphabet has 24 letters — from Alpha (Α α) to Omega (Ω ω), giving 48 distinct characters with upper and lowercase forms.
What is the Greek letter for pi? Pi is the sixteenth letter — Π (uppercase) and π (lowercase). In mathematics, π ≈ 3.14159 represents the ratio of a circle’s circumference to its diameter. Copy it here: π
What does Σ (sigma) mean in maths? Uppercase Σ is the summation symbol — “sum of” a sequence. Lowercase σ is standard deviation in statistics. Context determines which applies.
Do Greek letters work in Instagram bios and social media? Yes — all Greek letters are standard Unicode characters and work in Instagram, TikTok, Twitter, Discord, and all other platforms that support Unicode.
What is the difference between α and β in statistics? α (alpha) is the significance level — the probability threshold for rejecting the null hypothesis, typically set at 0.05. β (beta) is the probability of a type II error — failing to detect a real effect. These are foundational concepts in hypothesis testing.